How to fix Internet Explorer messing up webpages...

Well, my site: http://blackrussiancomics.com loads perfectly in firefox but not so for internet explorer. I’ve had to do numerous changes to the template and making some cuts that I did not want to.

Right now, if you view it in IE, there ‘should’ be no differences than in FF (if there are please let me know), but I’m just wondering is there any way to get around this? Is there anyway to know that something will not work in IE specifically? I’m using wordpress and my coding knowledge is minimal. Before my fixes, the sidebars would be distorted or the colours would overlap (i.e. footer color when be the body color, same with sidebars), I solved this by changing everything to white…sorry about the rant.

Note; I’ve found that IE 8 beta has a compatibility button, which when active, shows no errors.