LibreOffice does not natively support the Global Menu feature in Ubuntu 11.04 yet, but you can start enjoying that Global Menu goodness using the lo-menubar extension.
Note: Global Menu will appear on mouse-over as shown above.
Adding Global Menu support is easy. Open the Ubuntu Software Center and conduct a search for “lo-menubar“. Once the extension has displayed click on Install and within a few moments everything will be finished up. Keep in mind that you may need to log out, then back in to fully activate the Global Menu feature (which occurred on our system).
[via OMG! Ubuntu!]