diff --git a/examples/osgshaderterrain/osgshaderterrain.cpp b/examples/osgshaderterrain/osgshaderterrain.cpp
index c167ee432..38271c732 100644
--- a/examples/osgshaderterrain/osgshaderterrain.cpp
+++ b/examples/osgshaderterrain/osgshaderterrain.cpp
@@ -270,7 +270,6 @@ public:
         OpenThreads::ScopedLock<OpenThreads::Mutex> lock(_mutex);
 
 
-        unsigned int contextID = gc->getState()->getContextID();
         osg::GL2Extensions* gl2ext = gc->getState()->get<osg::GL2Extensions>();
         if( gl2ext )
         {
diff --git a/examples/osgtransferfunction/TransferFunctionWidget.h b/examples/osgtransferfunction/TransferFunctionWidget.h
index 806f4dbd2..64d9dd3af 100644
--- a/examples/osgtransferfunction/TransferFunctionWidget.h
+++ b/examples/osgtransferfunction/TransferFunctionWidget.h
@@ -19,12 +19,10 @@
 
 #include <osgUI/Widget>
 
-#define OSGUI_EXPORT
-
 namespace osgUI
 {
 
-class OSGUI_EXPORT TransferFunctionWidget : public osgUI::Widget
+class TransferFunctionWidget : public osgUI::Widget
 {
 public:
     TransferFunctionWidget(osg::TransferFunction1D* tf=0);
diff --git a/src/osgPlugins/lua/LuaScriptEngine.cpp b/src/osgPlugins/lua/LuaScriptEngine.cpp
index a714954e5..ce8ae26bf 100644
--- a/src/osgPlugins/lua/LuaScriptEngine.cpp
+++ b/src/osgPlugins/lua/LuaScriptEngine.cpp
@@ -2778,7 +2778,7 @@ int LuaScriptEngine::getDataFromStack(SerializerScratchPad* ssp, osgDB::BaseSeri
         {
             if (lua_isboolean(_lua, pos))
             {
-                ssp->set(static_cast<bool>(lua_toboolean(_lua, pos)));
+                ssp->set(static_cast<bool>(lua_toboolean(_lua, pos)!=0));
                 return 0;
             }
             else if (lua_isnumber(_lua, pos))
@@ -3116,7 +3116,7 @@ int LuaScriptEngine::setPropertyFromStack(osg::Object* object, const std::string
         {
             if (lua_isboolean(_lua, -1))
             {
-                _ci.setProperty(object, propertyName, static_cast<bool>(lua_toboolean(_lua, -1)));
+                _ci.setProperty(object, propertyName, static_cast<bool>(lua_toboolean(_lua, -1)!=0));
                 return 0;
             }
             else if (lua_isnumber(_lua, -1))
diff --git a/src/osgPlugins/lua/lua-5.2.3/src/lauxlib.c b/src/osgPlugins/lua/lua-5.2.3/src/lauxlib.c
index b00f8c709..1a505409e 100644
--- a/src/osgPlugins/lua/lua-5.2.3/src/lauxlib.c
+++ b/src/osgPlugins/lua/lua-5.2.3/src/lauxlib.c
@@ -600,7 +600,7 @@ static int skipBOM (LoadF *lf) {
   do {
     c = getc(lf->f);
     if (c == EOF || c != *(const unsigned char *)p++) return c;
-    lf->buff[lf->n++] = c;  /* to be read by the parser */
+    lf->buff[lf->n++] = (char)c;  /* to be read by the parser */
   } while (*p != '\0');
   lf->n = 0;  /* prefix matched; discard it */
   return getc(lf->f);  /* return next character */
@@ -650,7 +650,7 @@ LUALIB_API int luaL_loadfilex (lua_State *L, const char *filename,
     skipcomment(&lf, &c);  /* re-read initial portion */
   }
   if (c != EOF)
-    lf.buff[lf.n++] = c;  /* 'c' is the first character of the stream */
+    lf.buff[lf.n++] = (char)c;  /* 'c' is the first character of the stream */
   status = lua_load(L, getF, &lf, lua_tostring(L, -1), mode);
   readstatus = ferror(lf.f);
   if (filename) fclose(lf.f);  /* close file (even in case of errors) */
diff --git a/src/osgPlugins/lua/lua-5.2.3/src/lcode.c b/src/osgPlugins/lua/lua-5.2.3/src/lcode.c
index 820b95c0e..4a92b3463 100644
--- a/src/osgPlugins/lua/lua-5.2.3/src/lcode.c
+++ b/src/osgPlugins/lua/lua-5.2.3/src/lcode.c
@@ -270,7 +270,7 @@ void luaK_checkstack (FuncState *fs, int n) {
 
 void luaK_reserveregs (FuncState *fs, int n) {
   luaK_checkstack(fs, n);
-  fs->freereg += n;
+  fs->freereg += (lu_byte)(n);
 }
 
 
@@ -702,8 +702,8 @@ static void codenot (FuncState *fs, expdesc *e) {
 
 void luaK_indexed (FuncState *fs, expdesc *t, expdesc *k) {
   lua_assert(!hasjumps(t));
-  t->u.ind.t = t->u.info;
-  t->u.ind.idx = luaK_exp2RK(fs, k);
+  t->u.ind.t = (lu_byte)t->u.info;
+  t->u.ind.idx = (short)luaK_exp2RK(fs, k);
   t->u.ind.vt = (t->k == VUPVAL) ? VUPVAL
                                  : check_exp(vkisinreg(t->k), VLOCAL);
   t->k = VINDEXED;
@@ -876,6 +876,6 @@ void luaK_setlist (FuncState *fs, int base, int nelems, int tostore) {
   }
   else
     luaX_syntaxerror(fs->ls, "constructor too long");
-  fs->freereg = base + 1;  /* free registers with list values */
+  fs->freereg = (lu_byte)(base + 1);  /* free registers with list values */
 }