just wondering if this is an isolated issue or if anyone else has run into this problem. System setup: - MacBookPro5,1 (2.4 GHz, 4GB RAM) - NVIDIA GeForce 9600M GT turned on - Upgraded from 10.5.8 to 10.6 - 64-bit kernel turned on - Latest build of Handbrake installed I started re-encoding a video (2-pass; turbo first past) in handbrake. Everything was going fine until it got partway through the second pass. Then I got a black screen and mouse cursor. The system was still on and functioning. I did a remote login from my 13" unibody MacBook via screen sharing. The system was still running just fine. Via screen sharing, I could continue working. I changed the screen resolution on the MBP and got my video back for a few minutes before I lost it again. I retried this using 32-bit kernel and the 9400M GPU but the only change was that I lost the display twice as fast. The only thing that I could think of would be a result of OpenCL. The nature of Handbrake is to take a video file, use every last bit of your CPU power and give you a new video clip in another format about an hour later. This may or may not be the case, but OpenCL uses the available GPU for excess CPU tasks. Is Handbrake taking all of the CPU and then trying to take as much of the GPU as possible or is there something just wrong with my computer?