Footer problem

Hello. I am having an issue with my sites footer in firefox.

http://katrinalapenne.com

I don't believe it was doing this before but since upgrading to firefox 4 the ip address and copyright divs are appearing up at the bottom of the browser window and slightly to the right rather centered then at the bottom of the site. This is not happening for any of the other browsers. I didn't change any of the css or code in the footer. there are a couple of additional wrapper divs around the mainWrapper div for the drop shadows but I don't know why that would be affecting the footer. If anyone had any suggestions I would really appreciate it. Let me know if you need any info.

Thanks!

anyone...

You have no HTML errors and only one CSS "error", so that's not the problem. It happens in Firefox 3.6 too.
You do have a bunch of wrappers with 100% height, which means 100% of the window, not 100% of the content. This could be causing the problem, as the position is clearly related to the window height.