Opening cinematic issue

Hey guys just having a weird issue with the cinematics (start one and in-game). They all work fine except for when the voice overs come on, the whole screen kinda greys out and you can only see the subtitles, but as soon as they talking stops the cinematic goes back to normal (till the talking starts again).

Anyone got this issue? rest of the game runs great.

My graphics cars is a Radeon HD6770M and i've updated to the latest driver (the beta 13.8), it did the same with the official latest driver version aswell.

Any ideas?

Try going to an older driver to see if maybe it's an update with your driver?