--- a/src/gui/painting/qpaintengine_x11.cpp	Fri Sep 17 08:34:18 2010 +0300
+++ b/src/gui/painting/qpaintengine_x11.cpp	Mon Oct 04 01:19:32 2010 +0300
@@ -1916,6 +1916,8 @@
     int sh = qRound(sr.height());
 
     QPixmap pixmap = qt_toX11Pixmap(px);
+    if(pixmap.isNull())
+        return;
 
     if ((d->xinfo && d->xinfo->screen() != pixmap.x11Info().screen())
         || (pixmap.x11Info().screen() != DefaultScreen(X11->display))) {