I have the original 2.16 firmware.
I recently burned a DVD+RW and I tested the result with DVDInfoPro, and it says the booktype is still DVD+RW.
Unfortunately it won't play in my stand-alone dvd player.
strange that you didn't post this image before but waited for some answer first... anyway... i've been doing some testing with several NEC clones the last few ours, and this booktype is not that easy to explain... I also tried some hacked firmwares...
We tested all the following drives:
NEC 2510A 2.15
NEC 2510A 2.16
NEC 3500A 2.07 (probably the same as upcoming 2.17)
TDK 1616N (all TDK drives with various firmwares...)
we used CopytoDVD and latest Nero 6, and what we got was DVD-ROM
TDK 1616N 2.C7 is supposed to have DVD-ROM booktype setting for SL media by default. I burned 3 +RW discs, and 2 of them had DVD-ROM booktype, while the last one had +RW booktype
I then used TDK 1616N 2.77, 2.78 versions... again, the same
I then switched to NeC 3500 (both 2.16 and 2.07) and 2510A, and again, two discs were recorded as DVD-ROM and the last one was recorded as +RW. The +RW disc was the same disc in every case...
I then flashed the drive to the Maddog firmware 2.f8... again the same...
I then did something that made me understand what is really going on with this NEC bitsetting mystery...
I used only 2 +RW discs, the NEC 3500A (tried both 2.16 and 2.07) and the LiteON 1633S... I changed the booktype from the first RW media to DVD-ROM...
Then i recorded both with NEC 3500A... The discs retained their booktype setting... the first one was DVD-ROM and the second one was DVD+RW... This means that the booktype setting for +RW discs is automatically set to +RW or -ROM, BUT IT IS LEFT UNTOUCHED!!!
Because of pierrearonnax observation, we now have one more nice info for the 3500A that will clear things up a little bit more....
I know that this whole bitsetting issue for NEC drives is confusing, so, if everyone has any more questions about this, please post here...