When trying to extract all the frames from http://upload.wikimedia.org/wikipedi...ia_history.gif into any format (I've tried BMP & GIF), I get bad exports of frames 4 thru 24.

It's probably because those frames use frame optimization (I'm guessing frame differencing).

The only workaround seems to be to load the GIF animation in e.g. a browser and use IrfanView to snap screenshots.

IV 4.28