Post Content Cuts off at End of Sidebar

I am brand new to WordPress and hired a developer to create the basic framework for a site I am planning to launch on 12/12/12 (two days, ahh!)

He unfortunately headed to the Caribbean a few days ago so I’m not able to ask him questions and am running into a problem: on pages where my post/main body content is longer than the length of the the sidebar, the content cuts off right where the header ends and does not display fully.

Here’s an example of the problem I’m seeing:

As you can see, the main content cuts off right around the end of the sidebar (a little before)

I’ve tried to mess around with the overflow: properties in #main, but when I change all overflows to visible the content just runs right over the footer instead of pushing it down. I’ve also tried to implement lots of tutorials on sticky footers, etc. to no avail. The problem seems to be occuring in all browsers.

Any thoughts/tips on how to fix this would be hugely appreciated.

Alyssa