MouseOver Caption – How Can I Get Rid Of It?

When I MouseOver a link on my site a little caption box shows up. On the main page, links such as About and Contact show a small caption that says “edit me”. Is there a way to remove these captions all together? At first I thought it was simply an issue with NextGen Gallery (the plugin I use to show the photos), then I realized that these captions are also present on my main page links which have nothing to do with the gallery plugin. If it helps, the template I use is called “SimpleT”.

Here is a link to my site to better show the problem I am trying to resolve: Damien Thompson Photography. MouseOver any link and the box will show up, even if there is no text in the caption.

I greatly appreciate any input on this problem, thank you.