I have upgraded to FireFox 3 and your avy still shows the pic saying i haven't .
This is the said issue. The message you're seeing is the 1st of 2 frames in my APNG animated avatar. Browsers other than Firefox 3 and Opera 9.5 cannot render the animation part, so they fallback to a standard PNG and show just the 1st frame.
The way I have it, the 1st frame (the message) only displays itself for 1 millisecond, then goes to the 2nd frame and stays there (I have no looping). The issue is that on ZFGC it wants to jump back to the 1st frame for whatever reason, and since I have no looping, animation has already stopped so it won't go back to frame 2 (unless "coaxed" in some way as specified in my 1st giant post under "Old Issues").
Now if I turned on looping, it wouldn't have a problem (hence Darklight's avatar) - but in Firefox I think 1ms is still kinda noticable (must check), but I don't think it is in Opera. I'll try it though.
EDIT: HA! I FIGURED A WAY AROUND IT!. Have it loop, but only twice with the 2nd frame at 99999ms. That way when it jumps back to the first frame, the animation isn't actually complete and will continue animating to the 2nd frame as normal! daaaaa Naaaaa NAAAAA
NAAAAAAAAAAAAAAA!!!!!EDIT 2: That still doesn't help that the issue still exists though ¬_¬. I'll let it slide for now since it's probably something with the current SMF version that will hopefully not happen in the future. (but that still doesn't explain why it's Firefox only... so I guess it's Firefox + SMF only? huh.)