WTF MacBook?

So I hit play on a Keynote presentation today and my MacBook (running a completely up-to-date Leopard) restarted. When It booted back up and I logged into my user account my Dock had been moved back to the bottom of the screen (I have it on the right side) it was no longer auto hiding, magnification was off (which is typically on by default) and the default programs had been returned — thus removing all the programs I placed in the Dock. There was no information about the crash, and I didn’t get asked if I want to share the info with Apple (as there was no info to share since it didn’t remember it crashed). What’s up with that?

(Update: Expose also got reset. Talk about a near total revert to factory default).