Army of Darkness(THX version with Bruce and 2 skeleton dudes on the cover)

I've been experiecing some problems with this disc. In the extras, it will freeze randomly for about a second(each time I start it, it will freeze at different times).
Should I return the disc and get the other version(I took the last one of this edition)?
I'm not sure if it is a problem with the disc since the temp. freezings happen at different times.

I'm using my PC, H+ decoder, Sony DDU220E 5x drive

Do you have the latest drivers (Version 1.81) installed? The same problem I had with Starship Troopers where suddenly after such a interrupt the film and the voice were out of sync. Furthermore the Ghostbusters Video-commentary would't work. After installing the new drivers all works fine.
Michi

Yeah I have the latest drivers and ghostbusters commentary works fine