Comment 5 for bug 1290310

I'm getting the same problem:

scott@scott-Ubuntu:~$ nautilus
Could not register the application: Timeout was reached

scott@scott-Ubuntu:~$ ps aux | grep nautilus
scott 2723 0.0 0.6 1379804 53692 ? Sl 09:13 0:09 nautilus -n
scott 7579 0.0 0.0 15948 924 pts/0 S+ 15:39 0:00 grep --color=auto nautilus
scott@scott-Ubuntu:~$

scott@scott-Ubuntu:~$ killall -9 nautilus

scott@scott-Ubuntu:~$ ps aux | grep nautilus
scott 7584 0.0 0.0 15944 924 pts/0 S+ 15:41 0:00 grep --color=auto nautilus

scott@scott-Ubuntu:~$ nautilus
Nautilus-Share-Message: Called "net usershare info" but it failed: 'net usershare' returned error 255: net usershare: cannot open usershare directory /var/lib/samba/usershares. Error No such file or directory
Please ask your system administrator to enable user sharing.
tdb(__NULL__): tdb_open_ex: called with name == NULL

(nautilus then starts within a couple of minutes).