I went from the VS0K load for 40X to the VS06 load for 48X. I burned on Fuji 24x, Fuji 32x, Verbatim 32x, Memorex 40x Black CD, and Imation 40x. Not a single one of these discs was 100% good according to Nero CDspeed. The Fuji 32x had 11% damaged and 0% unreadable when burned at 40x. The same media had 30% damaged and 20% unreadable when burned at 24x. All of the other media had similar amounts of damaged and unreadable sectors. The majority of the damaged sectors were in the middle of the disc and it did not seem to matter what media or speed I burned.
I flashed back to the VS0k load for 40x and burned another Fuji 32x disc at 24x and it came out 100% readable so I know it's not a problem with my drive or the discs. I burned about 25 coasters tonight doing testing.
The perplexing question for me is how come the review of the drive on this site, as well as other forum posters seem to have write problems with only certain media, with the majority of it burning fine at the smartburn speeds, but when I did it I couldn't burn a readable disc to save my life?