I just read a thread on the 'Site Feedback & Help' section - seems the avatar size has nothing to do with supporting members or anything like that ..it's the forum software specified size (5KB) Avatar Picture Size on New Forum | E-Cigarette Forum
Apparently, the change carried over any avatars in use, which is why mine and some others remained as OK. Those then trying to change the avatar to something different, found the 5kb a difficult issue (as many have found), but they couldn't go back to the old avatar because the software then stated it was too big.
Bottom line is, until a bigger size can hopefully be provided, if you're happy with your avatar, leave it !
Apparently, the change carried over any avatars in use, which is why mine and some others remained as OK. Those then trying to change the avatar to something different, found the 5kb a difficult issue (as many have found), but they couldn't go back to the old avatar because the software then stated it was too big.
Bottom line is, until a bigger size can hopefully be provided, if you're happy with your avatar, leave it !