I've noticed "UserRemove #" messages popping up in the console whenever NPCs leave the sector (maybe for players too?). I first noticed this behavior after the most recent update.

I removed all my plug-ins and can confirm that it is not caused by a plug-in.

It's a debugging statement that wasn't removed before the release.

But Ray, it was such an excellent feature! We miss it already! It's disappearance is probably going to kill the IRC bot... Please have mercy!

Death to IRC bot!!!