Hi all, we've disabled offsite avatars for reasons of readability (seen a few really huge ones linked to), and also loading issues. If the site your avatar is on isn't responding in certain ways, it can actually lock up the loading of a thread in peoples browsers (cool huh?)
If anyone noticed theirs vanished, they can upload a new one in their profile settings - maximum size is 20k and 80x80.
This message will self destruct when I remember to delete it in a few days or so.