http://bugs.winehq.org/show_bug.cgi?id=15011
--- Comment #7 from Vincent Povirk madewokherd@gmail.com 2010-08-16 18:06:11 --- Apparently I was able to reproduce this at some point in the past and thought it related to multi-frame images. So I've sent a patch for that: http://www.winehq.org/pipermail/wine-patches/2010-August/092074.html
But I no longer remember why I thought that or how to test this bug.