Recently I have problem flashing to the latest 451@851 GS0F firmware (the disc burn successully in Nero, but failed the data verification). I had this same problem long time ago when I did 451@851 GS0A. It suddenly worked when I used the GS0C.
Several days ago I used LDW851FP.EXE to do the GS0F and I got back the problem, so I flashed back and forth to GS0C (851) and GSB4 (original 451), which all gave me the same problem. I then did a LTNFlash Compare the GSB4 firmware in the drive after I flashed it, and it immediately said they're different.
Anyway, now I used the 451@851 GS0F from the polish site (not using LDW851FP), and flashed it back to GS0F. I burned to a DVD+RW (ProDisc) The first time it failed the Nero verification AFTER a sucessful burn. Then I reburn the disc WITHOUT any formatting, and it did go through (that means the disc was EMPTY??!!), and then it went through and passed the verification. So weird