I'm wondering why my thread keeps getting bumped by totally unrelated things.

Hi, you may remember me from such failed projects as PHP imageboard. The project is still running strong, but it's no longer PHP. Bet you can't guess what I'm coding it in, now. (Hint: you wish it were perl but it's not even.)

Random question: why does lasthit have to have the same value for original posts and all replies? Wouldn't just the original post cut it?