Thanks for the great contribution.
I found that it's useful to apply a max-width size limit on user avatars. To do so, just add the following to the Thread Template head block:
tr.CS_forum td img {
max-width: 200px;
width: expression(this.width > 200 ? 200: true);
}
The second line (width:expression) is an IE5 workaround (refer to http://phydeaux3.blogspot.com/2006/01/max-width-and-faking-it-for-ie.html)
You can see it in action here: monashwushu.com/forum
Patrick