I tried to listen to a “copy-controlled” audio CD in my Liteon 401s and it won’t load at all. Windows XP reports no disk after many attempts with the lights flashing.
This CD loads fine on my LDR-4812W on the same machine )which I was hoping to remove it one day).
The protection is Cactus and the version.txt file shows
4.1 build 2e
One more reason for hopes of improved firmware.