XF 1.2 Above Breadcrumb AD causing problems


I've added the above the breadcrumb banner spot to my forum. The banner is a tad bigger than most sizes at 1100x136.

Once I load the banner code up and the associated css, the pulldowns for the user, inbox, alert will not pull up - or down as the case may be. Same goes for the text input and WSIWYG edit when I try to post a new message.

If I remove the code for the banner in the ad template, the problem clears up.

Any thoughts/solutions?