Chat window isn't rendering quite right

Hi there.

So, I recently installed the chat plugin, but when I click the "click here to chat" bar, the chat window seems to render below what's visible, if that makes sense. I'm using Firefox 7.0.1 on a windows machine as my browser, and I'm using WP version 3.2.1 (which should be the latest version, right?).

To see this in action, please see http://www.brightblueink.com

Is it just a compatibility issue with the theme that I'm using? If so, does anyone have any ideas for how I can work around this?

Thanks.