I dont know how to explain my problem properly so i'll post a screenshot.
http://oi39.tinypic.com/2nby52f.jpg
In this dark scene you can clearly see that i'm having some graphic bugs or pixel errors.. or whatever and i dont know how to fix this. This is something that only happens with VLC, NOT on forexample youtube.
gfx card : NVIDIA Geforce GTX 560 Ti
windows 7, SP 1, 64bit
8 GB ram
cpu: Intel(R) Core(TM) i5-2500K CPU @ 3.30 GHz