2.8GHz Core 2 Duo - Mid 2009 4GB Ram 10.5.8 / 10.6.8 Computer takes about 10 minutes to start up, once it is up it runs normally. When I go to shutdown, i get a slow window shade effect followed by a kernel panic message. This cycle runs like clockwork, I have not been able to shut it down without a panic in two weeks. So far i have: Done a fresh install of 10.6.8 (initially was 10.5.8) Swapped hard drives, fresh install on 2nd hard drive Tested RAM with MemTest86 Booted with only 1 RAM stick / booted with only the 2nd stick Ran apple hardware diag which came back successful. Looking in Library/Logs I do not see a panic log, only things I show are DiskUtility.log and a Sync folder. What else can I try?