Visual studio does not show content of files

Question

Picture says it all, it should currently be showing a file but as you can see its having issues drawing the content of the file.

I have unloaded all addons and restart visual studio.
If it mathers the previus project was a VS 2k8.

New Info:
If i wait a good 5min ( I have a Quad core I7 with 6gb ram, 295gtx. VS is running from a SSD).
It will load the text, but im unable to "edit", as it will have loaded some document (.cs ) but when i select the one i want to edit it not realy open that file.
It can best be described as visual studio having a 5min lag.

Answer 1

This bug was created by mumble 1.2.x, but is fixed in the snapshot versions of 1.3.x. YOu can likely get simular bugs by other software that does DirectX overlay.