My opposition to that is the same as why we limit avatars to 80 x 80. It keeps the sidebar nice and narrow, so it's tidy. And yet you lot are all perfectly happy with stretching the posts themselves and making threads look hideous.
The limit on avatars was done because of other forums where such limits don't exist, and the place looks like a dump. Ducks posted some links AGES ago and they were HIDEOUS. If we KEEP posting stretched pictures we'll end up looking the same.
Then again, you lot wouldn't know style if it bit you. You all want the forums to go back to the wider view which was so much messier, unless you have a massive monitor like Cliff does