I'm having a problem with selecting and arranging the icons in the launcher panel. I had the same problem in 13.10. I hoped it would go away in 14.04 but unfortunately it hasn't.
First, when I right click items in the launcher, and select lock or unlock nothing happens. Icons for closed programs don't disappear, and when I try to lock apps to the launcher they don't stay once they are closed. Also, when I restart the computer none of the apps I 'unlocked' went away. They are still there.
Also (and maybe worse...) drag and drop rearrangement of the icons doesn't work. When I try to drag and drop an app's icon to a new position it doesn't stay put. When I move the mouse away from the launcher I'm unable to select anything at all, until I move the pointer back to the launcher and replace the icon in it's old location.
I've tried restarting unity, but the same problems persist. Any ideas? Thanks!