Adjustment needed (FF good, IE no good)

Hi there,
Hopefully someone can help me out here. I’m using the theme, 3k2 from Hakan Aydin…so if anyone’s familiar with this theme it might be helpful.
My blogs shaping up, and can be viewed here. The problem that I’m having is within the main text (post, comments, etc…). In FF the margins look fine, but in IE it displays about 30-40px from the left. Here is a little snippet of code.

.leftbar {
font: 1em/1.5em Verdana, Arial, Helvetica, sans-serif;
margin: -20px 0px 0px 0px;
width: 210px;
float: left; position:relative; display:block;
}
#primary {
width: 500px;
float:left;
margin:20px 10px 0 10px;
}
.secondary {
font: 1em/1.5em Verdana, Arial, Helvetica, sans-serif;
margin: 15px 15px 15px 750px;
width: 150px;
}

Columns are like this .leftbar / #primary / .secondary
Could this be a float problem??
If more info is needed just let me know.
Thanks for the help.