Bitmaps randomly corrupt?

[alberto]

look in here!

Textures glitching out randomly with a weird pattern

[HighresScreenshot00005] Anybody have any idea what this is? Its happening randomly to like 5% of the objects in every level. If I open the material there is a texture or two that is just blank. If I reload the texture from source it fixes it. Or if I restart the project it fixes it… but other textures will be missing…