The jury is still out on Ubuntu 11.04 (Natty Narwhal). I've come to relay on my Ubuntu box too much to upgrade but I wanted to run LibreOffice. Here's how to get LibreOffice on your Ubuntu 10.10 box:
1. Uninstall OpenOffice. Open a TERMINAL window and type:
sudo apt-get purge "openoffice*.*"
Hit ENTER and type Y when asked if you want to remove OpenOffice.
2. Add the LibreOffice Repository (still in the TERMINAL type:)
gksu add-apt-repository ppa:libreoffice/ppa
Hit ENTER
gksu apt-get update
Hit ENTER
3. Download and Install LibreOffice (still in the TERMINAL type:)
sudo apt-get install libreoffice libreoffice-gnome language-support-en
Hit ENTER
4. DONE.
NOTE: Step 3 will download about 140mbs of data from the Internet so be patience.