http://i47.tinypic.com/2vtee4z.jpg

While it's not particularly easy to see, inside the black boxes are 'shadows' of my unit frames. They seem to stretch a bit further than the actual frames but this is even harder to show. I'd really like to know what's causing this and, if possible, how to fix it. It may not seem intrusive as they are relatively invisible, but it is visible in forum text too and once you notice it, you are always aware that the duplicates are there.

http://i47.tinypic.com/2ppcvvs.jpg

The second image shows the text smudge from the MMO Champion front page. Once again, it's not very clear but it's the best I could get in an image. The most defined thing there is the underline that continues. These seem to only appear on the right of text and UI components.

Anyone got a clue what this is or what I could do about it?

EDIT: Just to clarify, yes my WoW and desktop resolutions are both set to the native which is 1366x768.

Thanks.