Need help with an issue

Cannot quite put a finger on this one yet. I do not know if it is related to my CSS or if it is related to my template. Basically all is fine in FireFox, Opera, Chrome, etc but in IE8, the bottom bar of the checkout border disappears on the final step. I have gone over the div’s and I cannot find any out of whack which is usually the case but I am hoping someone with better web development skills might be able to spot the reason this bottom border is disappearing. I am using Brandon’s checkout mod with some other tweaks. I am sure I am at fault but I’ll be damned if I can find it. I have attached screenshots and anyone willing to take a look can go to