IE not displaying dropdown panel properly

I'm trying to figure out why my site appears to be displaying a dropdown panel ok in FF, Chrome etc., but not in Internet Explorer (7+ as I don't support IE6 now):

http://www.thelivingleader.com/

The image on the lefthand side is disappearing, the link with id #offerbtn isn't styled properly and the panel shows by default. I'm also getting an error message from IE saying:

The instruction at "0x3fa07838" referenced memory at "0x000000008". The memory could not be "read".

Could it be to do with my jQuery statements in the footer of the document? Any help figuring out what's going wrong here massively appreciated...

Thanks

Osu

Edit - here's the code: http://www.pastie.org/2541961

An element that does not exist in the HTML specs will be ignored or at least behave very bad in IE. Other browsers might accept it, but for future compliancy I would encourage you to stick to the HTML specs.

The offer element is unknown, so will be rendered depending on the browser's goodness towards your document. IE7 will crunch it.

But how about tablet browsers, Linux browsers and all others?