Mumble overlay showing white boxes

[xanek]

Hi, I was wondering why that the mumble overlay would show white boxes where the names of people should be whenever I play some games, is it due to the DirectX verison that the game uses or what?

The game in question currently is Team Fortress 2 and I am using a FPS configuration currently for it and I have no idea if that may or may not cause trouble on why the overlay isn't working correctly.

http://i41.tinypic.com/j9qz35.jpg