I've been working on a hmmwv and it was going fine until this glitch randomly appeared on every object in the scene.
The 'Texture' of object mode/edit mode has black fuzzy bits in it and some of the mesh you can see through some of the mesh you can't but their is clearly a face their as when I go into face select mode I can highlight the ones I can see through. I've also tried to fix it by highlighting it and removing doubles but that doesn't seem to do anything.
I have a screenshot of what I mean:
