User-Agent:       Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.31 (KHTML, like Gecko) Chrome/26.0.1410.63 Safari/537.31

Desktop freezes when go to activities(not all time) or when use "gnomesu gedit"(more common)
I try killing gnome-shell, but i guess he try restart and stay in the same problem(see the log).
The only way is rebooting the system..
Mouse, music(banshee) and tty, still working when all frozen.

log(with comments(#)):

2013-05-14T17:46:00.505494-03:00 c3po dbus[662]: [system] Successfully activated service 'org.freedesktop.nm_dispatcher'   #last thing i used
2013-05-14T17:53:05.345001-03:00 c3po gnome-session[1534]: CRITICAL: unable to create file '/run/user/1000/dconf/user': Permissão negada.  dconf will not work properly.    #the problem
2013-05-14T17:53:28.030318-03:00 c3po gnome-session[1534]: last message repeated 46 times
2013-05-14T17:53:28.030252-03:00 c3po systemd[1]: Starting Getty on tty4...    #logging in tty4
2013-05-14T17:53:28.036963-03:00 c3po systemd[1]: Started Getty on tty4.
2013-05-14T17:53:28.187406-03:00 c3po gnome-session[1534]: CRITICAL: unable to create file '/run/user/1000/dconf/user': Permissão negada.  dconf will not work properly.   #same problem again
2013-05-14T17:53:31.746266-03:00 c3po gnome-session[1534]: last message repeated 17 times
2013-05-14T17:53:31.746199-03:00 c3po login: pam_unix(login:session): session opened for user root by LOGIN(uid=0)
2013-05-14T17:53:31.748952-03:00 c3po systemd-logind[592]: New session 21 of user root.
2013-05-14T17:53:31.828375-03:00 c3po login: ROOT LOGIN ON tty4   #login
2013-05-14T17:53:42.879131-03:00 c3po acpid: 1 client rule loaded
2013-05-14T17:53:43.522408-03:00 c3po gnome-session[1534]: CRITICAL: unable to create file '/run/user/1000/dconf/user': Permissão negada.  dconf will not work properly.    #the problem again
2013-05-14T17:54:22.592829-03:00 c3po gnome-session[1534]: last message repeated 35 times
2013-05-14T17:54:30.331470-03:00 c3po acpid: 1 client rule loaded
2013-05-14T17:54:30.961748-03:00 c3po gnome-session[1534]: CRITICAL: unable to create file '/run/user/1000/dconf/user': Permissão negada.  dconf will not work properly.
2013-05-14T17:54:42.848200-03:00 c3po gnome-session[1534]: last message repeated 32 times
2013-05-14T17:54:42.848078-03:00 c3po systemd[1]: Deactivating swap /dev/sda8...   #I gave command to reboot

Reproducible: Always

Steps to Reproduce:
1. gnomesu gedit
2. going to activities(gnome) or waiting till system frozen
3.
Actual Results:  
gnome freeze. Mouse, music and tty works.