I'm sorry to hear that you're having this issue.
In some cases, particularly with rental movies, even smaller scratches can have a more profound effect on Blu-Ray discs than DVD discs due to the difference in size.
As far as the unit freezing up after the update, you might try to download and install the CD or thumbdrive version of the firmware. If that doesn't work, there may be something physically wrong with the system, in which case, having it repaired may be the best option.
I hope we can find a solution that meets your needs. Keep me posted.
Bought BD-P3600 in the summer. It is starting to freeze. I've had issues before where it froze if I played multiple movies through NetFlix without cycling it off and on. Recently (since upgrade to 2.04) it has started freezing on a couple titles, one I have owned and kept well, watched couple times already: (Ratatoullie) and other is a Netflix Blu Ray (Gladiator). Gladiator froze twice. I also noticed on Gladiator and Transformers Revenge of the Fallen it seemed during the ads that the sound was cutting out and on. Did not happen during the movie, however.
Please advise. I tried to accept the last upgrade and my reciever froze up after fully downloading (the screen saver froze for about 30 minutes, not responding to any keys).
I will call Samsung service phone #, but any input on cause or corrective would be appreciated.