F3 Kills XP
Here's a good one for you. I've been trying to hack my register on Windows XP to enable InnoDB tables in MySQL (which doesn't seem to be working). When I hit F3 to search for the next instance of "mysqld-nt.exe" - it kills my machine. The screen just goes dark and seemingly shuts down (though the power light is still on). If I press the power button, it'll power off fully. Of course, pressing it again powers it back on again. Wierd - guess it's time to switch to OS X for the day.
Thinking out loud: Maybe I should switch AppFuse to using PostgreSQL by default so users don't have to jump through hoops to get transactional tables.