Lenovo G500/ Ubuntu 14.04
After installing some UI tweek application:
Unity Tweak Tool
It seems that one the applications (or their combination) caused the menus in the top panel launcher to be empty. I'm not sure this is the problem though.
Now all the application menus are empty. The main menu only offers my user+guest, no shutdown/suspend....
Some menus (like wireless) are full, but these are the exceptions.
Any Idea how to solve it?