I have a weird problem with my 15" 2.33Gig Core 2 Duo (Merom) MBP. When I reboot it takes up to 15 minutes to stabilise. There is huge amounts of disk activity that makes the computer unresponsive and virtually unusable during this time. There are no applications that open at startup. I have noticed that copying between USB2 to Firewire 800 external disks is about 5 times faster than from the internal (160GB 5400RPM Hitachi HTS541616J9SA00) drive. I have nuked and paved the machine but no difference (though I did import old preferences). Looking for some help from a grown up!