I solved the problem by installing a new DVD Rom drive. ItÂ´s definitly a compatibility problem with the DVD drive. I did reinstall the whole system before and the same problem was still there. DonÂ´t do it!
I think it is by far the cheapest to buy a new dvd rom for ripping. In Germany they go for about 40â‚¬. I had a TEAC DV 516E-A before which had the problem. And I think I read somewhere that it actually is a Pioneer or vice versa (OEM stuff). Now I have a Liteon 165 H and it works fine.
MAybe the new updates of Any DVD might solve the problem too?