CSS and IE

Well, I went to look at my website the other day at work on my PC and realized that I have a fairly serious CSS issue. I didn't realize that IE and Firefox/Safari handled CSS code so completely different. Since I've been building my site on my Powerbook, I had no way of knowing that it looked like crap in IE...Yay...I gotta get 'er fixed, no wonder all my stats show Firefox as the browsers that look at my site...