diff -r 41300fa6a67c -r 2f34d5167611 src/plugins/gfxdrivers/directfb/qdirectfbwindowsurface.cpp
--- a/src/plugins/gfxdrivers/directfb/qdirectfbwindowsurface.cpp	Tue Feb 02 00:43:10 2010 +0200
+++ b/src/plugins/gfxdrivers/directfb/qdirectfbwindowsurface.cpp	Fri Apr 16 15:50:13 2010 +0300
@@ -1,6 +1,6 @@
 /****************************************************************************
 **
-** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
 ** All rights reserved.
 ** Contact: Nokia Corporation (qt-info@nokia.com)
 **
@@ -378,9 +378,6 @@
         return;
     }
     screen->flipSurface(dfbSurface, flipFlags, region, offset);
-    if (noSystemBackground) {
-        dfbSurface->Clear(dfbSurface, 0, 0, 0, 0);
-    }
 #else
     setOpaque(windowOpacity != 0xff);
     if (mode == Offscreen) {