Firefox rendering menu image incorrectly
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Hi all – I was wondering if anyone could offer any insight into a problem I am having, which I can't get my head around. Initially it was a problem with Chrome, but since having fixed that it is now with Firefox.

Check out the following left menu image. When it renders Firefox, the "go" button hovers underneath for some reason. This does not occur in other browsers.

Firefox menu: http://imageshack.us/photo/my-images/254/20212630.jpg/

Here is the HTML and CSS jsfiddle.net/yXaJE

I am using Firefox 14.0.1