Index: source/blender/editors/space_view3d/drawobject.c
===================================================================
--- source/blender/editors/space_view3d/drawobject.c	(revision 27116)
+++ source/blender/editors/space_view3d/drawobject.c	(working copy)
@@ -6070,6 +6070,9 @@
 	glClearDepth(1.0); glClear(GL_DEPTH_BUFFER_BIT);
 	glEnable(GL_DEPTH_TEST);
 
+	// Multisampling breaks indexes
+	glDisable(GL_MULTISAMPLE_ARB); 
+
 	switch( ob->type) {
 	case OB_MESH:
 	{
@@ -6114,6 +6117,9 @@
 		break;
 	}
 
+	// Re-enable it (shouldn't do anything if multisampling isn't used)
+	glEnable(GL_MULTISAMPLE_ARB);
+
 	glLoadMatrixf(rv3d->viewmat);
 }