Someone in the first email thread mentions that gif doesn't officially
support optimize for gif files. And that sounds good... but maybe it
would be better if PIL ignored the attribute instead of creating this
seemingly invalid image?
Re: Saving gifs with optimize=True results in bad image
I get the same issue on windows 7 python 2.6.4. Both gimp and Internet
Explorer don't like the image. Does seem like some sort of patch is in
order, and perhaps a note in the documentation, which does not mention
optimize under the GIF specific notes. It does say elsewhere that "If
a writer doesn't recognize an option it is silently ignored" which
should probably be done in this case. If the GIF writer does support
optimize, the documentation should say that explicitly.