Ie8 Div Jumps After Page Load

I have the following setup. 1 column with a left floated inner column and a right floated inner column. Works very well on firefox. IE does something strange. I have parts in the

Solution 1:

Had margin-left:10px. changed that to padding-left:10px; now it is working!

Solution 2:

In my case (trying in IE 7) I had to change:

margin-left: 6.35em;

to

margin-left: 90px;

em to px... doing so no more jumping happens after page load. IE is really really bad!