Upgrade To Latest Unity
You can get the latest version of unity in Ubuntu 11.04 Natty Narwhal by adding the ppa:unity/ppa ppa in your system. To do so,
- In terminal run sudo add-apt-repository ppa:unity/ppa
- after that run sudo apt-get update
- and finally run sudo apt-get upgrade
This will fix number of bugs and improve performance on your system.