Oh, I can do it as well, no problem, but some designs where you have to do pixel perfect floats to achive a specific effect, things can break in IE.
Some examples of IE bugs: http://www.positioniseverything.net/explorer.html
Here is a very simple example: http://www.positioniseverything.net/...der-chaos.html
Really simple CSS, but IE isn't able to render it correctly.
Fredi
