I have the same problem with my Plextor PX-712A Drive. I can burn the DVD with the max speed only
Or worse: it will show 8x writing but I suspect that it's still writing at 4x as burning of 4GB took about 27 minutes
I looked at the To-Do list and I haven't found entry for this problem. Any hints if it was solved or not?
Thanx
Narag