diff --git a/src/Demos/hangglide/GliderManipulator.cpp b/src/Demos/hangglide/GliderManipulator.cpp
index 1e283638a..79f4bdfd3 100644
--- a/src/Demos/hangglide/GliderManipulator.cpp
+++ b/src/Demos/hangglide/GliderManipulator.cpp
@@ -1,8 +1,8 @@
-#include <osg/Notify>
-#include <osg/Types>
-
 #include "GliderManipulator.h"
 
+#include <osg/Types>
+#include <osg/Notify>
+
 using namespace osg;
 using namespace osgUtil;
 
@@ -88,27 +88,27 @@ bool GliderManipulator::handle(const GUIEventAdapter& ea,GUIActionAdapter& us)
             addMouseEvent(ea);
             us.requestContinuousUpdate(true);
             if (calcMovement()) us.requestRedraw();
-
+            return true;
         }
-        return true;
+
         case(GUIEventAdapter::RELEASE):
         {
 
             addMouseEvent(ea);
             us.requestContinuousUpdate(true);
             if (calcMovement()) us.requestRedraw();
-
+            return true;
         }
-        return true;
+
         case(GUIEventAdapter::DRAG):
         {
 
             addMouseEvent(ea);
             us.requestContinuousUpdate(true);
             if (calcMovement()) us.requestRedraw();
-
+            return true;
         }
-        return true;
+
         case(GUIEventAdapter::MOVE):
         {
 
@@ -116,8 +116,8 @@ bool GliderManipulator::handle(const GUIEventAdapter& ea,GUIActionAdapter& us)
             us.requestContinuousUpdate(true);
             if (calcMovement()) us.requestRedraw();
 
+            return true;
         }
-        return true;
 
         case(GUIEventAdapter::KEYBOARD):
             if (ea.getKey()==' ')
@@ -128,17 +128,28 @@ bool GliderManipulator::handle(const GUIEventAdapter& ea,GUIActionAdapter& us)
                 us.requestContinuousUpdate(false);
                 return true;
             }
+            else if (ea.getKey()=='+')
+            {
+                _camera->setFusionDistanceRatio(_camera->getFusionDistanceRatio()*1.25f);
+                return true;
+            }
+            else if (ea.getKey()=='-')
+            {
+                _camera->setFusionDistanceRatio(_camera->getFusionDistanceRatio()/1.25f);
+                return true;
+            }
             return false;
+
         case(GUIEventAdapter::FRAME):
             addMouseEvent(ea);
             if (calcMovement()) us.requestRedraw();
             return true;
+
         case(GUIEventAdapter::RESIZE):
-        {
             init(ea,us);
             us.requestRedraw();
-        }
-        return true;
+            return true;
+
         default:
             return false;
     }
@@ -161,9 +172,12 @@ void GliderManipulator::addMouseEvent(const GUIEventAdapter& ea)
 
 bool GliderManipulator::calcMovement()
 {
+    _camera->setFusionDistanceMode(osg::Camera::PROPORTIONAL_TO_SCREEN_DISTANCE);
+
     // return if less then two events have been added.
     if (_ga_t0.get()==NULL || _ga_t1.get()==NULL) return false;
 
+
     float dt = _ga_t0->time()-_ga_t1->time();
 
     if (dt<0.0f)
@@ -220,7 +234,7 @@ bool GliderManipulator::calcMovement()
 
     lv *= (_velocity*dt);
 
-    mat *= Matrix::translate(center + lv);
+    mat *= Matrix::translate(center+lv);
 
     _camera->transformLookAt(mat);
 
diff --git a/src/Demos/osgimpostor/osgimpostor.cpp b/src/Demos/osgimpostor/osgimpostor.cpp
index 0f97aee93..e82110f10 100644
--- a/src/Demos/osgimpostor/osgimpostor.cpp
+++ b/src/Demos/osgimpostor/osgimpostor.cpp
@@ -14,6 +14,37 @@
 
 #include <osg/Quat>
 
+void write_usage(ostream& out,const std::string& name)
+{
+    out << std::endl;
+    out <<"usage:"<< std::endl;
+    out <<"    "<<name<<" [options] infile1 [infile2 ...]"<< std::endl;
+    out << std::endl;
+    out <<"options:"<< std::endl;
+    out <<"    -l libraryName      - load plugin of name libraryName"<< std::endl;
+    out <<"                          i.e. -l osgdb_pfb"<< std::endl;
+    out <<"                          Useful for loading reader/writers which can load"<< std::endl;
+    out <<"                          other file formats in addition to its extension."<< std::endl;
+    out <<"    -e extensionName    - load reader/wrter plugin for file extension"<< std::endl;
+    out <<"                          i.e. -e pfb"<< std::endl;
+    out <<"                          Useful short hand for specifying full library name as"<< std::endl;
+    out <<"                          done with -l above, as it automatically expands to"<< std::endl;
+    out <<"                          the full library name appropriate for each platform."<< std::endl;
+    out <<std::endl;
+    out <<"    -stereo             - switch on stereo rendering, using the default of,"<< std::endl;
+    out <<"                          ANAGLYPHIC or the value set in the OSG_STEREO_MODE "<< std::endl;
+    out <<"                          environmental variable. See doc/stereo.html for "<< std::endl;
+    out <<"                          further details on setting up accurate stereo "<< std::endl;
+    out <<"                          for your system. "<< std::endl;
+    out <<"    -stereo ANAGLYPHIC  - switch on anaglyphic(red/cyan) stereo rendering."<< std::endl;
+    out <<"    -stereo QUAD_BUFFER - switch on quad buffered stereo rendering."<< std::endl;
+    out <<std::endl;
+    out <<"    -stencil            - use a visual with stencil buffer enabled, this "<< std::endl;
+    out <<"                          also allows the depth complexity statistics mode"<< std::endl;
+    out <<"                          to be used (press 'p' three times to cycle to it)."<< std::endl;
+    out << std::endl;
+}
+
 int main( int argc, char **argv )
 {
 
@@ -22,21 +53,7 @@ int main( int argc, char **argv )
 
     if (argc<2)
     {
-        osg::notify(osg::NOTICE)<<"usage:"<< std::endl;
-        osg::notify(osg::NOTICE)<<"    osgimpostor [options] infile1 [infile2 ...]"<< std::endl;
-        osg::notify(osg::NOTICE)<< std::endl;
-        osg::notify(osg::NOTICE)<<"options:"<< std::endl;
-        osg::notify(osg::NOTICE)<<"    -l libraryName     - load plugin of name libraryName"<< std::endl;
-        osg::notify(osg::NOTICE)<<"                         i.e. -l osgdb_pfb"<< std::endl;
-        osg::notify(osg::NOTICE)<<"                         Useful for loading reader/writers which can load"<< std::endl;
-        osg::notify(osg::NOTICE)<<"                         other file formats in addition to its extension."<< std::endl;
-        osg::notify(osg::NOTICE)<<"    -e extensionName   - load reader/wrter plugin for file extension"<< std::endl;
-        osg::notify(osg::NOTICE)<<"                         i.e. -e pfb"<< std::endl;
-        osg::notify(osg::NOTICE)<<"                         Useful short hand for specifying full library name as"<< std::endl;
-        osg::notify(osg::NOTICE)<<"                         done with -l above, as it automatically expands to the"<< std::endl;
-        osg::notify(osg::NOTICE)<<"                         full library name appropriate for each platform."<< std::endl;
-        osg::notify(osg::NOTICE)<< std::endl;
-
+        write_usage(osg::notify(osg::NOTICE),argv[0]);
         return 0;
     }
 
@@ -60,7 +77,11 @@ int main( int argc, char **argv )
 
     // load the nodes from the commandline arguments.
     osg::Node* model = osgDB::readNodeFiles(commandLine);
-    if (!model) return 0;
+    if (!model)
+    {
+        write_usage(osg::notify(osg::NOTICE),argv[0]);
+        return 1;
+    }
     
 
     // the osgUtil::InsertImpostorsVisitor used lower down to insert impostors
diff --git a/src/Demos/osgreflect/osgreflect.cpp b/src/Demos/osgreflect/osgreflect.cpp
index ab3156ef2..e6e9d2d78 100644
--- a/src/Demos/osgreflect/osgreflect.cpp
+++ b/src/Demos/osgreflect/osgreflect.cpp
@@ -99,23 +99,35 @@ osg::Drawable* createMirrorSurface(float xMin,float xMax,float yMin,float yMax,f
     return gset;
 }
 
-void write_usage()
+void write_usage(ostream& out,const std::string& name)
 {
-    osg::notify(osg::NOTICE)<< std::endl;
-    osg::notify(osg::NOTICE)<<"usage:"<< std::endl;
-    osg::notify(osg::NOTICE)<<"    osgreflect [options] infile1 [infile2 ...]"<< std::endl;
-    osg::notify(osg::NOTICE)<< std::endl;
-    osg::notify(osg::NOTICE)<<"options:"<< std::endl;
-    osg::notify(osg::NOTICE)<<"    -l libraryName     - load plugin of name libraryName"<< std::endl;
-    osg::notify(osg::NOTICE)<<"                         i.e. -l osgdb_pfb"<< std::endl;
-    osg::notify(osg::NOTICE)<<"                         Useful for loading reader/writers which can load"<< std::endl;
-    osg::notify(osg::NOTICE)<<"                         other file formats in addition to its extension."<< std::endl;
-    osg::notify(osg::NOTICE)<<"    -e extensionName   - load reader/wrter plugin for file extension"<< std::endl;
-    osg::notify(osg::NOTICE)<<"                         i.e. -e pfb"<< std::endl;
-    osg::notify(osg::NOTICE)<<"                         Useful short hand for specifying full library name as"<< std::endl;
-    osg::notify(osg::NOTICE)<<"                         done with -l above, as it automatically expands to the"<< std::endl;
-    osg::notify(osg::NOTICE)<<"                         full library name appropriate for each platform."<< std::endl;
-    osg::notify(osg::NOTICE)<< std::endl;
+    out << std::endl;
+    out <<"usage:"<< std::endl;
+    out <<"    "<<name<<" [options] infile1 [infile2 ...]"<< std::endl;
+    out << std::endl;
+    out <<"options:"<< std::endl;
+    out <<"    -l libraryName      - load plugin of name libraryName"<< std::endl;
+    out <<"                          i.e. -l osgdb_pfb"<< std::endl;
+    out <<"                          Useful for loading reader/writers which can load"<< std::endl;
+    out <<"                          other file formats in addition to its extension."<< std::endl;
+    out <<"    -e extensionName    - load reader/wrter plugin for file extension"<< std::endl;
+    out <<"                          i.e. -e pfb"<< std::endl;
+    out <<"                          Useful short hand for specifying full library name as"<< std::endl;
+    out <<"                          done with -l above, as it automatically expands to"<< std::endl;
+    out <<"                          the full library name appropriate for each platform."<< std::endl;
+    out <<std::endl;
+    out <<"    -stereo             - switch on stereo rendering, using the default of,"<< std::endl;
+    out <<"                          ANAGLYPHIC or the value set in the OSG_STEREO_MODE "<< std::endl;
+    out <<"                          environmental variable. See doc/stereo.html for "<< std::endl;
+    out <<"                          further details on setting up accurate stereo "<< std::endl;
+    out <<"                          for your system. "<< std::endl;
+    out <<"    -stereo ANAGLYPHIC  - switch on anaglyphic(red/cyan) stereo rendering."<< std::endl;
+    out <<"    -stereo QUAD_BUFFER - switch on quad buffered stereo rendering."<< std::endl;
+    out <<std::endl;
+    out <<"    -stencil            - use a visual with stencil buffer enabled, this "<< std::endl;
+    out <<"                          also allows the depth complexity statistics mode"<< std::endl;
+    out <<"                          to be used (press 'p' three times to cycle to it)."<< std::endl;
+    out << std::endl;
 }
 
 int main( int argc, char **argv )
@@ -126,7 +138,7 @@ int main( int argc, char **argv )
 
     if (argc<2)
     {
-        write_usage();
+        write_usage(osg::notify(osg::NOTICE),argv[0]);
         return 0;
     }
 
@@ -152,7 +164,7 @@ int main( int argc, char **argv )
 
     if (!loadedModel)
     {
-        write_usage();
+        write_usage(osg::notify(osg::NOTICE),argv[0]);
         return 1;
     }
     
diff --git a/src/Demos/osgtexture/osgtexture.cpp b/src/Demos/osgtexture/osgtexture.cpp
index 74148c155..d16cb2b2c 100644
--- a/src/Demos/osgtexture/osgtexture.cpp
+++ b/src/Demos/osgtexture/osgtexture.cpp
@@ -327,26 +327,38 @@ osg::Node* createModelFromImages(ImageList& imageList)
 }
 
 
-void write_usage()
+void write_usage(ostream& out,const std::string& name)
 {
-    osg::notify(osg::NOTICE)<<std::endl;
-    osg::notify(osg::NOTICE)<<"usage:"<<std::endl;
-    osg::notify(osg::NOTICE)<<"    osgtexture [options] image_file1 [image_infile2 ...]"<<std::endl;
-    osg::notify(osg::NOTICE)<<std::endl;
-    osg::notify(osg::NOTICE)<<"options:"<<std::endl;
-    osg::notify(osg::NOTICE)<<"    -l libraryName     - load plugin of name libraryName"<<std::endl;
-    osg::notify(osg::NOTICE)<<"                         i.e. -l osgdb_pfb"<<std::endl;
-    osg::notify(osg::NOTICE)<<"                         Useful for loading reader/writers which can load"<<std::endl;
-    osg::notify(osg::NOTICE)<<"                         other file formats in addition to its extension."<<std::endl;
-    osg::notify(osg::NOTICE)<<"    -e extensionName   - load reader/wrter plugin for file extension"<<std::endl;
-    osg::notify(osg::NOTICE)<<"                         i.e. -e pfb"<<std::endl;
-    osg::notify(osg::NOTICE)<<"                         Useful short hand for specifying full library name as"<<std::endl;
-    osg::notify(osg::NOTICE)<<"                         done with -l above, as it automatically expands to the"<<std::endl;
-    osg::notify(osg::NOTICE)<<"                         full library name appropriate for each platform."<<std::endl;
-    osg::notify(osg::NOTICE)<<std::endl;
-    osg::notify(osg::NOTICE)<<"example:"<<std::endl;
-    osg::notify(osg::NOTICE)<<"    osgtexture lz.rgb"<<std::endl;
-    osg::notify(osg::NOTICE)<<std::endl;
+    out << std::endl;
+    out <<"usage:"<< std::endl;
+    out <<"    "<<name<<" [options] image_infile1 [image_infile2 ...]"<< std::endl;
+    out << std::endl;
+    out <<"options:"<< std::endl;
+    out <<"    -l libraryName      - load plugin of name libraryName"<< std::endl;
+    out <<"                          i.e. -l osgdb_pfb"<< std::endl;
+    out <<"                          Useful for loading reader/writers which can load"<< std::endl;
+    out <<"                          other file formats in addition to its extension."<< std::endl;
+    out <<"    -e extensionName    - load reader/wrter plugin for file extension"<< std::endl;
+    out <<"                          i.e. -e pfb"<< std::endl;
+    out <<"                          Useful short hand for specifying full library name as"<< std::endl;
+    out <<"                          done with -l above, as it automatically expands to"<< std::endl;
+    out <<"                          the full library name appropriate for each platform."<< std::endl;
+    out <<std::endl;
+    out <<"    -stereo             - switch on stereo rendering, using the default of,"<< std::endl;
+    out <<"                          ANAGLYPHIC or the value set in the OSG_STEREO_MODE "<< std::endl;
+    out <<"                          environmental variable. See doc/stereo.html for "<< std::endl;
+    out <<"                          further details on setting up accurate stereo "<< std::endl;
+    out <<"                          for your system. "<< std::endl;
+    out <<"    -stereo ANAGLYPHIC  - switch on anaglyphic(red/cyan) stereo rendering."<< std::endl;
+    out <<"    -stereo QUAD_BUFFER - switch on quad buffered stereo rendering."<< std::endl;
+    out <<std::endl;
+    out <<"    -stencil            - use a visual with stencil buffer enabled, this "<< std::endl;
+    out <<"                          also allows the depth complexity statistics mode"<< std::endl;
+    out <<"                          to be used (press 'p' three times to cycle to it)."<< std::endl;
+    out << std::endl;
+    out<<"example:"<<std::endl;
+    out<<"     osgtexture lz.rgb"<<std::endl;
+    out<<std::endl;
 }
 
 int main( int argc, char **argv )
@@ -357,7 +369,7 @@ int main( int argc, char **argv )
 
     if (argc<2)
     {
-        write_usage();
+        write_usage(osg::notify(osg::NOTICE),argv[0]);
         return 0;
     }
 
@@ -400,7 +412,10 @@ int main( int argc, char **argv )
         viewer.run();
     }
     else
-        write_usage();
+    {
+        write_usage(osg::notify(osg::NOTICE),argv[0]);
+        return 0;
+    }
     
     
     
diff --git a/src/Demos/osgviews/osgviews.cpp b/src/Demos/osgviews/osgviews.cpp
index 1feb11bab..8ca24ea40 100644
--- a/src/Demos/osgviews/osgviews.cpp
+++ b/src/Demos/osgviews/osgviews.cpp
@@ -14,6 +14,36 @@
 
 #include <osg/Quat>
 
+void write_usage(ostream& out,const std::string& name)
+{
+    out << std::endl;
+    out <<"usage:"<< std::endl;
+    out <<"    "<<name<<" [options] infile1 [infile2 ...]"<< std::endl;
+    out << std::endl;
+    out <<"options:"<< std::endl;
+    out <<"    -l libraryName      - load plugin of name libraryName"<< std::endl;
+    out <<"                          i.e. -l osgdb_pfb"<< std::endl;
+    out <<"                          Useful for loading reader/writers which can load"<< std::endl;
+    out <<"                          other file formats in addition to its extension."<< std::endl;
+    out <<"    -e extensionName    - load reader/wrter plugin for file extension"<< std::endl;
+    out <<"                          i.e. -e pfb"<< std::endl;
+    out <<"                          Useful short hand for specifying full library name as"<< std::endl;
+    out <<"                          done with -l above, as it automatically expands to"<< std::endl;
+    out <<"                          the full library name appropriate for each platform."<< std::endl;
+    out <<std::endl;
+    out <<"    -stereo             - switch on stereo rendering, using the default of,"<< std::endl;
+    out <<"                          ANAGLYPHIC or the value set in the OSG_STEREO_MODE "<< std::endl;
+    out <<"                          environmental variable. See doc/stereo.html for "<< std::endl;
+    out <<"                          further details on setting up accurate stereo "<< std::endl;
+    out <<"                          for your system. "<< std::endl;
+    out <<"    -stereo ANAGLYPHIC  - switch on anaglyphic(red/cyan) stereo rendering."<< std::endl;
+    out <<"    -stereo QUAD_BUFFER - switch on quad buffered stereo rendering."<< std::endl;
+    out <<std::endl;
+    out <<"    -stencil            - use a visual with stencil buffer enabled, this "<< std::endl;
+    out <<"                          also allows the depth complexity statistics mode"<< std::endl;
+    out <<"                          to be used (press 'p' three times to cycle to it)."<< std::endl;
+    out << std::endl;
+}
 
 int main( int argc, char **argv )
 {
@@ -23,21 +53,7 @@ int main( int argc, char **argv )
 
     if (argc<2)
     {
-        osg::notify(osg::NOTICE)<<"usage:"<< std::endl;
-        osg::notify(osg::NOTICE)<<"    osgviews [options] infile1 [infile2 ...]"<< std::endl;
-        osg::notify(osg::NOTICE)<< std::endl;
-        osg::notify(osg::NOTICE)<<"options:"<< std::endl;
-        osg::notify(osg::NOTICE)<<"    -l libraryName     - load plugin of name libraryName"<< std::endl;
-        osg::notify(osg::NOTICE)<<"                         i.e. -l osgdb_pfb"<< std::endl;
-        osg::notify(osg::NOTICE)<<"                         Useful for loading reader/writers which can load"<< std::endl;
-        osg::notify(osg::NOTICE)<<"                         other file formats in addition to its extension."<< std::endl;
-        osg::notify(osg::NOTICE)<<"    -e extensionName   - load reader/wrter plugin for file extension"<< std::endl;
-        osg::notify(osg::NOTICE)<<"                         i.e. -e pfb"<< std::endl;
-        osg::notify(osg::NOTICE)<<"                         Useful short hand for specifying full library name as"<< std::endl;
-        osg::notify(osg::NOTICE)<<"                         done with -l above, as it automatically expands to the"<< std::endl;
-        osg::notify(osg::NOTICE)<<"                         full library name appropriate for each platform."<< std::endl;
-        osg::notify(osg::NOTICE)<< std::endl;
-
+        write_usage(osg::notify(osg::NOTICE),argv[0]);
         return 0;
     }
 
@@ -59,7 +75,11 @@ int main( int argc, char **argv )
 
     // load the nodes from the commandline arguments.
     osg::Node* rootnode = osgDB::readNodeFiles(commandLine);
-    if (!rootnode) return 0;
+    if (!rootnode)
+    {
+        write_usage(osg::notify(osg::NOTICE),argv[0]);
+        return 1;
+    }
 
     
     // create the vewiports
diff --git a/src/Demos/sgv/sgv.cpp b/src/Demos/sgv/sgv.cpp
index ec8786095..5459f565c 100644
--- a/src/Demos/sgv/sgv.cpp
+++ b/src/Demos/sgv/sgv.cpp
@@ -16,6 +16,37 @@
 
 #include <osgUtil/Optimizer>
 
+void write_usage(ostream& out,const std::string& name)
+{
+    out << std::endl;
+    out <<"usage:"<< std::endl;
+    out <<"    "<<name<<" [options] infile1 [infile2 ...]"<< std::endl;
+    out << std::endl;
+    out <<"options:"<< std::endl;
+    out <<"    -l libraryName      - load plugin of name libraryName"<< std::endl;
+    out <<"                          i.e. -l osgdb_pfb"<< std::endl;
+    out <<"                          Useful for loading reader/writers which can load"<< std::endl;
+    out <<"                          other file formats in addition to its extension."<< std::endl;
+    out <<"    -e extensionName    - load reader/wrter plugin for file extension"<< std::endl;
+    out <<"                          i.e. -e pfb"<< std::endl;
+    out <<"                          Useful short hand for specifying full library name as"<< std::endl;
+    out <<"                          done with -l above, as it automatically expands to"<< std::endl;
+    out <<"                          the full library name appropriate for each platform."<< std::endl;
+    out <<std::endl;
+    out <<"    -stereo             - switch on stereo rendering, using the default of,"<< std::endl;
+    out <<"                          ANAGLYPHIC or the value set in the OSG_STEREO_MODE "<< std::endl;
+    out <<"                          environmental variable. See doc/stereo.html for "<< std::endl;
+    out <<"                          further details on setting up accurate stereo "<< std::endl;
+    out <<"                          for your system. "<< std::endl;
+    out <<"    -stereo ANAGLYPHIC  - switch on anaglyphic(red/cyan) stereo rendering."<< std::endl;
+    out <<"    -stereo QUAD_BUFFER - switch on quad buffered stereo rendering."<< std::endl;
+    out <<std::endl;
+    out <<"    -stencil            - use a visual with stencil buffer enabled, this "<< std::endl;
+    out <<"                          also allows the depth complexity statistics mode"<< std::endl;
+    out <<"                          to be used (press 'p' three times to cycle to it)."<< std::endl;
+    out << std::endl;
+}
+
 
 int main( int argc, char **argv )
 {
@@ -25,21 +56,7 @@ int main( int argc, char **argv )
 
     if (argc<2)
     {
-        osg::notify(osg::NOTICE)<<"usage:"<< std::endl;
-        osg::notify(osg::NOTICE)<<"    sgv [options] infile1 [infile2 ...]"<< std::endl;
-        osg::notify(osg::NOTICE)<< std::endl;
-        osg::notify(osg::NOTICE)<<"options:"<< std::endl;
-        osg::notify(osg::NOTICE)<<"    -l libraryName     - load plugin of name libraryName"<< std::endl;
-        osg::notify(osg::NOTICE)<<"                         i.e. -l osgdb_pfb"<< std::endl;
-        osg::notify(osg::NOTICE)<<"                         Useful for loading reader/writers which can load"<< std::endl;
-        osg::notify(osg::NOTICE)<<"                         other file formats in addition to its extension."<< std::endl;
-        osg::notify(osg::NOTICE)<<"    -e extensionName   - load reader/wrter plugin for file extension"<< std::endl;
-        osg::notify(osg::NOTICE)<<"                         i.e. -e pfb"<< std::endl;
-        osg::notify(osg::NOTICE)<<"                         Useful short hand for specifying full library name as"<< std::endl;
-        osg::notify(osg::NOTICE)<<"                         done with -l above, as it automatically expands to the"<< std::endl;
-        osg::notify(osg::NOTICE)<<"                         full library name appropriate for each platform."<< std::endl;
-        osg::notify(osg::NOTICE)<< std::endl;
-
+        write_usage(osg::notify(osg::NOTICE),argv[0]);
         return 0;
     }
     
@@ -61,7 +78,11 @@ int main( int argc, char **argv )
 
     // load the nodes from the commandline arguments.
     osg::Node* rootnode = osgDB::readNodeFiles(commandLine);
-    if (!rootnode) return 0;
+    if (!rootnode)
+    {
+        write_usage(osg::notify(osg::NOTICE),argv[0]);
+        return 1;
+    }
     
     // run optimization over the scene graph
     osgUtil::Optimizer optimzer;