Those are cute! There's one on CPUK that'll cause you to have to reboot:
Just make sure you are not composing a PM... AND... neglect to save it first. That just happened to me a few days ago. I had just spent an hour and a half writing a PM to a fellow dry humor nerd and was about to top it off with a link to a different site than THAT one and came across it. I gullibly clicked on it and had to reboot. I also had to re-write the PM! AAARRRGHH!
Update: Parents convinced to allow me to keep greenhouse heated over winter. Most species will not be lost. Too lazy to update growlist.