diff -r 56cd8111b7f7 -r 41300fa6a67c src/plugins/imageformats/gif/qgifhandler.cpp
--- a/src/plugins/imageformats/gif/qgifhandler.cpp	Tue Jan 26 12:42:25 2010 +0200
+++ b/src/plugins/imageformats/gif/qgifhandler.cpp	Tue Feb 02 00:43:10 2010 +0200
@@ -335,7 +335,7 @@
                 QImage::Format format = trans_index >= 0 ? QImage::Format_ARGB32 : QImage::Format_RGB32;
                 if (image->isNull()) {
                     (*image) = QImage(swidth, sheight, format);
-                    memset(image->bits(), 0, image->numBytes());
+                    memset(image->bits(), 0, image->byteCount());
 
                     // ### size of the upcoming frame, should rather
                     // be known before decoding it.
@@ -393,7 +393,7 @@
                         backingstore = QImage(qMax(backingstore.width(), w),
                                               qMax(backingstore.height(), h),
                                               QImage::Format_RGB32);
-                        memset(image->bits(), 0, image->numBytes());
+                        memset(image->bits(), 0, image->byteCount());
                     }
                     for (int ln=0; ln<h; ln++) {
                         memcpy(backingstore.scanLine(ln),