For a bit of fun, I wanted to see how far forward I could make my mac go - turns out it was 2038. Anyway, I opened up Mail and every single past/present/future iCal alert/to do/note was resent/popped up, thus crashing my computer and giving me a kernel panic/forced shutdown. Everything's fine now but I had to delete the iCal files to remove the alerts. I've now fully recovered from a slow/crashed mac and my email is very, very full now. I'm just warning everyone not to fiddle around with the dates for fun. I hope Apple fixes this dangerous bug in 10.6. It's like the Millennium Bug all over again. God knows what happens when you try and go back!