So this is officially the worst art site I've ever used.
I wonder if this place has a suggestion box or something.
I really forgot about that format.
Make them a suggestion. Having APNG would be a good idea.
Also I cant remember well but I think fA didnt support it too.
i would guess it has to do with weasyl's resizing algorithm. fa doesn't resize uploaded images at all unless they're over the maximum, while weasyl is very fussy about how tall something is relative to screen size so it resizes everything.
(if i might digress for a minute, FA also has a long-neglected issue where if you edit the submission file it won't put a limit on the size or resize it at all. which is good because when FA resizes things it converts them to shitty JPGs and reprimands you for not doing the work yourself)
Link
cubey
http://forums.weasyl.com/vbulletin/forumdisplay.php?16-Site-Discussion
it's a little out-of-the-way...