Well the update that was supposed to fix a bunch of bugs actually created new ones. Users are reporting that 10.5.2 is killing the DVD Player causing a complete system hang and a forced restart. There is a discussion about the problem plus others here.

This kinda sucks for me too, I was planning on ripping a few DVDs to my iPod Touch tomorrow before I leave on my trip this weekend. I guess I will have to stick with what I have for the time being.