Content overlapping footer

Alright, I’m familiar with CSS and PHP but never had any formal training, so forgive me if this seems newbish. I just switched to WordPress (http://www.staleoutofthebox.com/) and I’ve been working on modifying my theme. Love it so far! However, there’s a bug I can’t quite work out. Would love help.

When I scroll to the bottom of the page, the footer (and credit link) are completely overlapped by the content (in both IE and FireFox). I can’t seem to get it to move to the right place.

Also, when I scroll to the bottom in IE, the “Next Page” link is completely cut off. This problem doesn’t occur in FireFox.