Pio 112L only allows 4X on MCC 004 - help

My Pioneer 112L 8.21FW was working great
I opened a new spindle of Verbatims (MCC 004) from newegg
and whenever I try to burn with the Pioneer, the only speed allowed is 4X??

what happened? the discs work fine in my LiteOn (same tower)

Dell 4600
WinXP Pro SP2 (2008-01 install)
P4 2.6 GHz
2 Gig DDR 400 (512MB x 4) dual channel PC3200
Creative SB Live! 5.1
XFX GeForce 7600GT 256MB GDDR3
PCI dual fan card
500W CoolerMaster PSU
320GB HDD IDE 8MB 7200rpm
500GB HDD IDE 8MB 7200Rpm
Pioneer 112L 8.21 RPC1 DVD-RAM
Alcohol 120% virtual DVD-ROM
3/4 Floppy
USB 2.0

well ive tested a few more blanks and all seems fine now.
Could a few blanks been subpar? I used them in the LiteOn and they burned fine.

should I re-Flash the pioneer? leave it alone?

Similar problem here: http://club.cdfreaks.com/f87/verified-bug-dvr-212-212d-firmware-1-24-a-241982/

Apparently unresolved.

I would ask the seller…