3 Column blogger theme positioning Issue IE vs Firefox

I am having an issue with a blogger 3 column theme which is displaying much differently in IE and Firefox. I think the issue is due to the different ways Internet Explorer and Firefox display widths, margins and padding. Firefox looks ok but still needs adjustment for some sidebar items. In Internet Explorer the third column items starts vertically at the end of the second column. I don't know how well I explained that but here is the site: [[login to view URL]][1] Compare the site in IE and Firefox. Looking for someone to fix the css. ## Deliverables The theme displaying 3 columns, must display the same in Internet explorer and Netscape, with no gaps in the sidebars. ## Platform Must test in Internet Explorer 6, 7 and Firefox 2.