diff -r 41300fa6a67c -r 3b1da2848fc7 src/gui/image/qpixmap_x11.cpp
--- a/src/gui/image/qpixmap_x11.cpp	Tue Feb 02 00:43:10 2010 +0200
+++ b/src/gui/image/qpixmap_x11.cpp	Fri Feb 19 23:40:16 2010 +0200
@@ -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)
 **
@@ -1932,6 +1932,8 @@
         x11Data->hd = (Qt::HANDLE)XCreatePixmap(X11->display,
                                                 RootWindow(X11->display, xinfo.screen()),
                                                 w, h, d);
+        x11Data->setSerialNumber(++qt_pixmap_serial);
+
 #ifndef QT_NO_XRENDER
         if (X11->use_xrender) {
             XRenderPictFormat *format = x11Data->d == 32