Taiyo Yuden can be bought direct (non-branded) from many online retailers like supermediastore.com, rima.com, meritline.com, etc. You can also get branded Taiyo Yuden in the form of FUJI 8X DVD+R Made in Japan, TDK 8X DVD+R Made in Japan and Sony 8X DVD+R Made in Japan at your local brick and mortar store(s) (Best Buy, Circuit City, Office Depot, etc.)...make sure it's Made in Japan.
all Verbatim branded media is MCC.
i have TDK 8X DVD-R which are TTG02 and results were just OK, but not great.
try simulating a burn in another program or do a real burn to see if the problem still persists.
running out for a bit...good luck and keep us updated on your trials and tribulations...perhaps someone else here can offer some suggestions on what to do before return/exchange/RMA.