[Lynne]

OK, as mentioned, if you want the usergroups to have larger size avatars, you should increase it as a usergroup setting. But, if you want them all to be the same size in the postbit, you will need to write some CSS. Something like:

.postbitlegacy .userinfo .postuseravatar img {width: 300px;}

(800px or 600px is really, really large. So is 300px, but it's just an example.)