QML flickr demo occasionally fails to load images

If you keep dragging the image grid up and down with the mouse, eventually one or more thumbnails will fail to display and the following will appear on the console:

file:///home/jrandomhacker/qt-everywhere-opensource-src-4.7.0-rc1/demos/declarative/flickr/mobile/GridDelegate.qml:47:22: QML ParentChange: Unable to preserve appearance under non-uniform scale
file:///home/jrandomhacker/qt-everywhere-opensource-src-4.7.0-rc1/demos/declarative/flickr/mobile/GridDelegate.qml:30:18: QML Image: Error decoding: http://l.yimg.com/g/images/photo_unavailable_s.gif: Unable to read image data

Once in this state, clicking on the missing thumbnail causes more copies of these messages to be printed on the console and the demo gets stuck displaying a progress bar at 100%. Pressing the Back button shows the image grid with a solid white block in place of the missing thumbnail.