After the last roll20 update I've noticed the web page formatting of player avatars on the Looking for Players page seems broken. I've seen it for multiple roll20 campaigns using both the latest version of both Firefox and Chrome (on Windows), as well as with these and and additional browsers on mobile devices. It's now apparently displayed as whatever size image was added in a players profile instead of a set size, breaking the campaign members grid entirely. In some cases the images don't even seem to be in the order members joined.
