Everytime I log off my game crashes. Every time. Windows XP, I've heard several other reports of this as well. It's only been happening after the latest update.

Are you using any plugins? Targetless makes the game reload the interface on logoff, so if a plugin is crashing when it reloads logging off will cause it to crash as well, if you have targetless.

Targetless never crashed me before 1.8.160, nor did any other plugins, and I don't have any new ones.