Hi, I am new to Macs and I recently bought a MacBook after not wanting to deal with Vista. My MacBook works great and I don't think I'll ever go back to Windows. I have just recently been experiencing problems watching DVDs: 1. After watching a movie without moving the mouse for a while, and then when I move my mouse or press a key my computer will either show the screen saying that the computer needs to reboot, or the application playing the dvd will freeze and I will not be able to quit it or force quit it. I use the included "DVD Player" and VLC Media Player. I am wondering if this isn't an issue with my hardware issue with my dvd drive or a software issue. I seems that this issue has only ocured since I have installed Toast 8 Titanium, which I have since removed. I have run the OS X hardware checker utility that came on my OS X CD, but it found no errors. Maybe I should run the Extended test in "Loop Mode''? It seems that my Issue is only with DVDs, I can listen, Burn, Rip CDs just fine, no errors. I can also Burn DVDs no problem, just the playback issue... [with both burnt and regular movie dvds] Any help would be greatly appreciated!