I've got a stack of Maxell MXL RG02 that I've always been able to burn well at 4X with most recent firmwares for the 1213 or 1633.
I recently flashed to CS0M and though that firmware has worked fine with other blanks, Nero will only let me burn the MXL RG02 at 1X. (There are no other speeds in the drop-down list in Nero.)
I tried reflashing with CS0M and it didn't help. (The media burn speed for this type of disk is set at 4X, according to Omnipatcher.)
Any solutions or explanations?