Thank you to everyone who has been writing in about your experiences with the timer bug. I've identified two different cases that could cause similar symptoms. One has been patched -- I hope that some of you will see this problem vanish because of it.
The other is still being worked, but I'm happy to say that we now at least have a solid direction to go in.
Please do continue sending in your bug reports! There may still be important clues out there that will help me resolve this faster. :)
In other news, we got about 40 new animal images added today.