diff --git a/src/osg/glu/libutil/mipmap.cpp b/src/osg/glu/libutil/mipmap.cpp
index 58b309da9..b27ab4503 100644
--- a/src/osg/glu/libutil/mipmap.cpp
+++ b/src/osg/glu/libutil/mipmap.cpp
@@ -908,10 +908,11 @@ static void halveImage_uint(GLint components, GLuint width, GLuint height,
         for (j = 0; j < newwidth; j++) {
             for (k = 0; k < components; k++) {
                 /* need to cast to double to hold large unsigned ints */
-                s[0] = ((double)*(const GLuint*)t +
-                        (double)*(const GLuint*)(t+group_size) +
-                        (double)*(const GLuint*)(t+ysize) +
-                        (double)*(const GLuint*)(t+ysize+group_size))/4 + 0.5;
+                GLdouble buf = (double)*(const GLuint*)t +
+                               (double)*(const GLuint*)(t+group_size) +
+                               (double)*(const GLuint*)(t+ysize) +
+                               (double)*(const GLuint*)(t+ysize+group_size);
+                s[0] = (GLuint)(buf/4.0 + 0.5);
                 s++; t += element_size;
 
             }
@@ -925,12 +926,11 @@ static void halveImage_uint(GLint components, GLuint width, GLuint height,
         for (j = 0; j < newwidth; j++) {
             for (k = 0; k < components; k++) {
                 /* need to cast to double to hold large unsigned ints */
-                GLdouble buf;
-                buf = (GLdouble)__GLU_SWAP_4_BYTES(t) +
-                      (GLdouble)__GLU_SWAP_4_BYTES(t+group_size) +
-                      (GLdouble)__GLU_SWAP_4_BYTES(t+ysize) +
-                      (GLdouble)__GLU_SWAP_4_BYTES(t+ysize+group_size);
-                s[0] = (GLuint)(buf/4 + 0.5);
+                GLdouble buf = (GLdouble)__GLU_SWAP_4_BYTES(t) +
+                               (GLdouble)__GLU_SWAP_4_BYTES(t+group_size) +
+                               (GLdouble)__GLU_SWAP_4_BYTES(t+ysize) +
+                               (GLdouble)__GLU_SWAP_4_BYTES(t+ysize+group_size);
+                s[0] = (GLuint)(buf/4.0 + 0.5);
 
                 s++; t += element_size;
             }
diff --git a/src/osgGA/MultiTouchTrackballManipulator.cpp b/src/osgGA/MultiTouchTrackballManipulator.cpp
index e612fbd36..a7e71d126 100644
--- a/src/osgGA/MultiTouchTrackballManipulator.cpp
+++ b/src/osgGA/MultiTouchTrackballManipulator.cpp
@@ -37,8 +37,6 @@ MultiTouchTrackballManipulator::MultiTouchTrackballManipulator( const MultiTouch
 
 void MultiTouchTrackballManipulator::handleMultiTouchDrag(const GUIEventAdapter* now, const GUIEventAdapter* last, const double eventTimeDelta)
 {
-    const float zoom_threshold = 0.0001f;
-
     osg::Vec2 pt_1_now(now->getTouchPointNormalizedX(0),now->getTouchPointNormalizedY(0));
     osg::Vec2 pt_2_now(now->getTouchPointNormalizedX(1),now->getTouchPointNormalizedY(1));
     osg::Vec2 pt_1_last(last->getTouchPointNormalizedX(0),last->getTouchPointNormalizedY(0));
@@ -51,7 +49,7 @@ void MultiTouchTrackballManipulator::handleMultiTouchDrag(const GUIEventAdapter*
 
     // osg::notify(osg::ALWAYS) << gap_now << " " << gap_last << std::endl;
 
-    
+
     // zoom gesture
     if (fabs(gap_last - gap_now) > 0.02)
         zoomModel( (gap_last - gap_now) , true );
diff --git a/src/osgShadow/DebugShadowMap.cpp b/src/osgShadow/DebugShadowMap.cpp
index 5bc2afad3..19094ff3c 100644
--- a/src/osgShadow/DebugShadowMap.cpp
+++ b/src/osgShadow/DebugShadowMap.cpp
@@ -401,14 +401,14 @@ void DebugShadowMap::ViewData::init( ThisClass *st, osgUtil::CullVisitor *cv )
     {
         // view can be a slave that covers only a fraction of the screen
         // so adjust debug hud location to proper viewport location
-        _viewportOrigin[0] += vp->x();
-        _viewportOrigin[1] += vp->y();
+        _viewportOrigin[0] += static_cast<unsigned short>(vp->x());
+        _viewportOrigin[1] += static_cast<unsigned short>(vp->y());
 
-        if( _viewportSize[0] > vp->width() - _viewportOrigin[0] )
-            _viewportSize[0] = vp->width() - _viewportOrigin[0];
+        if( _viewportSize[0] > (static_cast<unsigned short>(vp->width()) - _viewportOrigin[0]) )
+            _viewportSize[0] = static_cast<unsigned short>(vp->width()) - _viewportOrigin[0];
 
-        if( _viewportSize[1] > vp->height() - _viewportOrigin[1] )
-            _viewportSize[1] = vp->height() - _viewportOrigin[1];
+        if( _viewportSize[1] > (static_cast<unsigned short>(vp->height()) - _viewportOrigin[1]) )
+            _viewportSize[1] = static_cast<unsigned short>(vp->height()) - _viewportOrigin[1];
     }
 
     _orthoSize                = st->_orthoSize;
diff --git a/src/osgViewer/ViewerEventHandlers.cpp b/src/osgViewer/ViewerEventHandlers.cpp
index 7a6a3d7a6..2ef8e838c 100644
--- a/src/osgViewer/ViewerEventHandlers.cpp
+++ b/src/osgViewer/ViewerEventHandlers.cpp
@@ -712,14 +712,14 @@ InteractiveImageHandler::InteractiveImageHandler(osg::Image* image, osg::Texture
         double width = _camera->getViewport()->width();
         double height = _camera->getViewport()->height();
 
-        resize(width, height);
+        resize(static_cast<int>(width), static_cast<int>(height));
     }
 }
 
 bool InteractiveImageHandler::mousePosition(osgViewer::View* view, osg::NodeVisitor* nv, const osgGA::GUIEventAdapter& ea, int& x, int &y) const
 {
     if (!view) return false;
-    
+
     osgUtil::LineSegmentIntersector::Intersections intersections;
     bool foundIntersection = (nv==0) ? view->computeIntersections(ea, intersections) :
                                        view->computeIntersections(ea, nv->getNodePath(), intersections);