Originally Posted by cowboy

Your divs widths (left--200, right--168,main--432) add up to 800 which is the same as your container(800). Any extra padding, margin, or border will not allow a fit and the div to load last (your main here) will have to go into overflow and display later in the page. The right div is snapping to the left because they have it floating left instead of right.

Increase your overall container to like 810 px. Increase if it still has not positioned correctly and back off until it holds and add 1px for good measure.

Browsers are like heart transplant doctors. You want to educate them with your scripts so you know you don't have a rejection on your patient. IE has a greater degree of finesse to details.