One of the innovations introduced in the new Ubuntu Natty 11.04, we find the AppMenus or Global Menu , an applet that moves the application menu at the top panel ( screenshot bellow ) which increases the visibility of the window .
In one hand it is useful because it give us more space in the window of our application, in the other handit is very uncomfortable if we have to work very often with the menu functions.
If you want to disable AppMenus on Ubuntu 4.11 Natty, What you need to do is, open terminal and type the following command:
sudo mv / usr/lib/indicators/5/libappmenu.so / usr/lib/indicators/5/libappmenu.so.old
At this point we end the session or reboot our system, we can see that our windows back to normal:
If you want to have back the AppMenu, just enter the following command in terminal :
sudo mv /usr/lib/indicators/5/libappmenu.so.old /usr/lib/indicators/5/libappmenu.so
and you are done.