I'm running 12.04 64bit. I've been running gnome shell for a while and decided to give Unity a try. I logged out and back in with the Unity Shell selected.
I noticed that, sometimes when I press the super key, the dash takes about 0.5 to 1 second to open and it is extremely slow while searching/typing in it.
I'm guessing gnome-shell messed something up.
Also, another minor issue is when I right-click the desktop and click "Change desktop wallpaper", it simply opens the system settings, not any wallpaper options.
What's going on?