For some reason I am always seeing the name of a player in my raid in a tiny black box at the bottom of my screen. It is half covering my action bars, and Id like it gone. I cant seem to figure out how to get rid of it.

Ive isolated that it is being caused by xperl, because when i turn xperl off it goes away.

Please tell me how to get rid of it.

With out seeing a screenshot of the obstructing box my sugestion would be to clear out your SavedVaribles for X-Perl and see if that helps.  The two links in my sig can help you with that if you need it.

Probably xperl's focus window maybe?