There is a bug with the signs. If ou try to type "e" in the sign it will close and if you copy and paste the "e" from somewhere else it won`t let you press save.
Can you tell what makes it crash? Otherwise, no. I haven't fun into the issue yet.
EDIT: Actually, I found it. It is because of skeletons. For some odd reason...
I don't recall us doing a game called Alica, but it sounds ace ;)) Heheh, just messin' with ya.