diff -r dee5afe5301f -r 3f74d0d4af4c src/gui/embedded/qscreen_qws.cpp
--- a/src/gui/embedded/qscreen_qws.cpp	Mon Mar 15 12:43:09 2010 +0200
+++ b/src/gui/embedded/qscreen_qws.cpp	Thu Apr 08 14:19:33 2010 +0300
@@ -2739,7 +2739,7 @@
             default:
                 break;
             }
-            spanData.setup(qwsServer->backgroundBrush(), 256, QPainter::CompositionMode_SourceOver);
+            spanData.setup(qwsServer->backgroundBrush(), 256, QPainter::CompositionMode_Source);
             spanData.dx = off.x();
             spanData.dy = off.y();
         } else if (!surface->isBuffered()) {