Hello- After taking my 1st Gen 12" Powerbook in for Apple Care concerning a burn mark on the lower screen and power issues, having the problem continue, then taking it in again, Apple switched out my old PB for a new 1.5.! After the initial shock, I'm wondering if they've gotten the battery problems fixed. My 867 got about an hour and a half of life. I haven't gotten a chance to test my new machine out. What's the verdict on the newer models? Thanks.