They suddenly got larger. Was this intentional?
I know mine and Katu's are significantly larger.
Yes and no. The problem is with the externally linked avatars.
Long answer: I used to have some settings switched on / off that made these easy to handle and pretty. These settings, however, are not compatible with the gallery and blog stuff. So I had to change them. This caused issues with the animated avatars that were externally linked. So I had to do some other stuff. Some external avatars of some folks were painfully large ... like 800x600, and resizing the pic (instead of html resize, which was n issue all its own) to 65x65 made it ugly. So I upped the limit to 150x150. 100x100
Short answer: Upping the size on avatars caused a bit of interim wonkiness, which I'm fixing as I catch them. Yours be fixed now ;)