Haven't tried CloneDVD yet, but I did uninstall Nero completely and tried Roxio EMC 7.5 and got the same "session fixation error" at the lead-out. Although the drive came with KS04 already on it, I even tried reflashing it with that same firmware to see if that would help. Tried a new IDE cable too. No change in behavior.
Nothing fancy about the system it's in either. Just a P4 3.0C, i865G chipset, 1GB DDR400, 9500 Pro, 120GB Maxtor (pri master), the 1693S (sec master). Nothing slave on either channel or on the SATA ports. Going to hopefully try the drive out on a friend's system tomorrow. If it doesn't work after that, I'm RMA'ing it to Newegg and getting a PX-716. I love Lite-On for the price and size of the drive for my Shuttle system, but I should never stray from Plextor I guess. Odd that I can still go back and burn those crap 2x Princos without a single problem after all these 8x TY coasters. Just annoyed after wasting a dozen DVD-Rs already.