Every time i rip a dvd....the vob files get messed up...and i get artifacting wehn i play it back...like every 5 minutes for a second...all these sketchy blocks come up then disapear....i've tried smart ripper and dvd decryptor....and i've tried turning off dma and doing it really slow...which actually reduced the frequency of the artifacting....but i still get it...someone please help!