If changes to AnimatedImage are made it fails to send a signal that the sourceSize has changed after loading a source.
The width/height of the AnimatedImage will be 0, since the "setSource" call won't immediately load the source file ( it waits for onCompleted ), and after loading it, it did not call sourceSizeChanged(), therefore the width and height are never updated.
This bug has been introduced with Qt 4.8.x, Qt 4.7.2 did not have this problem,