Latest 851S firmware affecting ability to defeat copy protections?

I was wondering if anyone else has experienced this phenomenon. I was able to make perfectly working non-emulation copies of safedisc 2/3 games such as call of duty a few months ago. Sometime afterwards I updated to the latest Lite-on published firmware and suddenly I was unable to make working copies of games like MS Flight Sim 2K4, R6 Athena Shield, and Battlefield Vietnam. Correct me if I’m wrong, but one of these uses the exact same version of safedisc as CoD (something like 2.8x or 2.9x).

Is there any indication that lite-on changed the CD-R write strategy in this latest firmware? Or would something else firmware related cause this?

Can a mod please move this thread to one of the copy protection forums?