I'm not sure where to ask this. On this site if you show the active topics from the last 24 hours and you move the cursor over a link it show part of the contents of the post against an opaque background.
In my test installation at
http://test.twoplustwo.com hovering shows the text against a transparent background making it unreadable.
I imagine this is a style sheet issue, but it isn't obvious to me what needs to be fixed and how.