Drive no longer recognizes blank DVD's since I've upgraded to Snow Leopard

Question

Hello, I have an issue with my Super Drive (the UJ-875). Since I've upgraded to Snow Leopard, the drive no longer recognizes any blank media in it. I've tried -R, +R, -RW and +RW. No dice. The discs can be put in the drive and ejected without issue, it's just they are never displayed in Finder or Disk Utility. When I try to burn a mounted disc image, it simply sits there saying "To begin, insert a blank disc". I've tried using the exact same spindle of blank TDK -R's that I was using before I upgraded the O.S. I also tried some blank Sony media and it doesn't recognize it. It should be noted that the drive doesn't seem to have any issue with previously recorded discs. Those appear to read just fine, it's only blank media that looks like the issue. Any answers you can provide would be greatly appreciated. Below is the Disc Burning information that's displayed in About This Mac:
MATSHITA DVD-R UJ-875:
Firmware Revision: DB09
Interconnect: ATAPI
Burn Support: Yes (Apple Shipping Drive)
Cache: 2048 KB
Reads DVD: Yes
CD-Write: -R, -RW
DVD-Write: -R, -R DL, -RW, +R, +R DL, +RW
Write Strategies: CD-TAO, CD-SAO, DVD-DAO
Media:
Type: DVD-R
ID: RITEKF1
Blank: Yes
Erasable: No
Overwritable: Yes
Appendable: Yes
Write Speeds: 2x, 4x, 8x

Answer 1

Try repairing permissions: http://support.apple.com/kb/HT1452 -and resetting the Pram: http://docs.info.apple.com/article.html?artnum=2238