Try to remove/rename the nautilus settings folders in your home folder and reboot (logout/login?). This helped with me (Ubuntu 12.04)
murat@laptop:~/devel$ find /home/murat -name *nautilus* /home/murat/.gnome2/nautilus-scripts /home/murat/.gnome2/accels/nautilus /home/murat/.gconf/apps/nautilus_bak /home/murat/.gconf/apps/nautilus /home/murat/.config/nautilus-compare.conf /home/murat/.config/nautilus_bak /home/murat/.config/nautilus -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1172904 Title: Nautilus won't start/extremely slow To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nautilus/+bug/1172904/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs