Graphical Issues

When viewing an existing post, the "Post Reply" and the "New Topic" button is not as tall as the "Bookmark Topic" and "Watch Topic" buttons. It looks like the "Post Reply" and "New Topic" are <a href=""> links, and "Bookmark Topic" and "Watch Topic" are <input type="button">

In Internet Explorer 11(Windows) and Safari(Mac), they are still off, but by a much smaller amount. The size discrepancy is larger on Firefox.

There are lots of inconsistent capitalizations in the various buttons.

The ads don't seem to like centering themselves when the site is resized. The content adjusts fine, but the banner ad has a 12.5 em padding added to the side.

Longer text is a tight fit. I would recommend ditching the "button" metaphor for the left nav entirely. Using fixed-size rounded buttons with texturing, for something that is clearly a link, feels very GeoCitites to me.