MacBook Core Duo, Leopard 10.5.5, Keynote 4.0.3 Periodically when I play a Keynote presentation my MacBook will spontaneously restart. I've searched many different forums and found many others with the same problem, but no working fix yet. I have a huge presentation next week and obviously I can no longer trust Keynote to do it (quite a few ugly stories on the other forums about embarrassing keynote crashes in front of large audiences). Anybody else have luck with fixing this unlucky problem? Guess I'll be using P-Point...not nearly as pretty. bummer.