I hava a problem. Some icons from Launcher disappear. I locked them but they have disappear again after boot. I don't know what to do.
I have Ubutnu 12.04.2 LTS which I have installed today and used update.
Go in tty1 by pressing Ctrl+Alt+F1, login with your usser name and password and run next commands:
After reboot, the problem should disappear.