Let me share my experience with my LTR-52327S at QS0E.
My LTR-52327S is the first version, with seperate EEPROM, manufactured in October 2003 (I actually have a pair of these, with one still at QS0B).
I flashed my drive with firmware revision QS0E, ran a CD Speed "Creat Data Disc" command with a TDK 48x/RiTEK, and the drive "locked itself" at 28x P-CAV for some unknown reason. On the CD Speed curve, the drive would reach 28x via CAV, then the curve would rise and fall dramatically at speeds ranging from 22x-29x, like some sort of severe power calibration problem existed in the drive. Consequently, I flashed the drive with firmware revision QS0D. All is now well and the drive will write at 32x P-CAV and 40x, 48x, and 52x CAV.
So may my test be a warning to all of you who are considering flashing to QS0E - don't do it. QS0D works whereas QS0E doesn't.
I would love to hear everyone else's experiences.