I'm getting weird visual issues with the chat avatars that I didn't used to. Some of them will now 'flash black' roughly once every 10 seconds, eg. the third from left here:
In addition, for some icons when I hover over them, they become "not washed out" (correct), but when I unhover them, they 'flash black' like this briefly before going back to being washed out.
This happens both in my default profile, and also if I create a brand new profile.
I've tried clearing cache and reloading with ctrl+shift+r, but it doesn't fix it. My browser is Firefox 11, operating system Windows XP SP2.