Interestingly enough I bought 2 burners in 1 day. The other drive was a Toishiba 5372V I believe. I upgraded the firmware to TU15. It reads most DVD-R and DVD+R as 4X media. Aparently most of the descriptor codes are not in the firmware. I had thought that Toshiba was a GOOD drive… Now I am not so sure, especially after reading the reviews here. Is Toshiba a company that does not update their firmware often enough to adjust for the media? When I slapped in the Lite-on it read those same DVD-R’s at the correct speed. Also, the Toshiba failed 1 16X burn on a RICOH media and wrote a good one at 16X back to back. What a PITA. I didn’t realize that media was so important. The label was Memorex 16X media. I have burned MANY DVD’s over the last few years and never had a problem using ANY media out there with my Pioneer 106D @ 4X. The only problem I seem to be having is playing DVD-R’s in my standalone. Just won’t do it(KOSS 2004 standalone).