i have this observe on 3 LM12 installations. You can retrace ...
1. start LM12 (as yours default user) and take yours login
2. logout (do not shutdown)
3. login as guest
4. open nautilus, go to "/" etc... to /home/$username/
Guest cant delete files, but as a guest i can copy files from any! user ?!
it is a bug or a feature ???
yes, it is a feature....
http://www.linuxbsdos.com/2011/11/26/di ... x-mint-12/