I have the same media, using B7V9 and the exact same problems. I try to do a quality scan, but it will only scan part way through and say "Error: No additional sense information." or some other error. I didn't waste my media though. Instead I tried a couple of things:
1) Eject the tray and then close it. This works, say, 2 times out of 10--so I usually try option 2).
2) I have a USB enclosure for my drive, so I power it off and turn it back on. This works maybe 6 times out of 10.
It's an unusual problem, and a pain in the arse. Sometimes my scan will get 80% done and then give an error and I have to scan again. The DVD plays fine though; just problems doing a quality scan.
I hope it can be fixed in the next FW release.