- OSX bugfix: drawing selection code for vpaint and faceselect happens in AUX

buffers now. It only works nice at OSX (tested, linux and windows do not
  support it nicely)
  This fixes the annoying flashing during paint or select

source/blender/src/drawview.c

@@ -703,7 +703,9 @@ void backdrawview3d(int test)
 			return;
 		}
 	}
-
+#ifdef __APPLE__
+	glDrawBuffer(GL_AUX0);
+#endif	
 	if(G.vd->drawtype > OB_WIRE) G.zbuf= TRUE;
 	curarea->win_swap &= ~WIN_BACK_OK;
 	
@@ -758,6 +760,10 @@ void backdrawview3d(int test)
 	G.zbuf= FALSE; 
 	glDisable(GL_DEPTH_TEST);
 	glEnable(GL_DITHER);
+
+#ifdef __APPLE__
+	glDrawBuffer(GL_BACK); /* we were in aux buffers */
+#endif
 }