diff -r 56cd8111b7f7 -r 41300fa6a67c src/gui/painting/qpaintengine_mac.cpp
--- a/src/gui/painting/qpaintengine_mac.cpp	Tue Jan 26 12:42:25 2010 +0200
+++ b/src/gui/painting/qpaintengine_mac.cpp	Tue Feb 02 00:43:10 2010 +0200
@@ -1023,7 +1023,7 @@
 #endif
     QCFType<CGDataProviderRef> dataProvider = CGDataProviderCreateWithData(image,
                                                           static_cast<const QImage *>(image)->bits(),
-                                                          image->numBytes(),
+                                                          image->byteCount(),
                                                           drawImageReleaseData);
     if (imagePtr)
         *imagePtr = image;