Already running the latest and greatest Ubuntu with the new unity desktop?
It also introduced a new menu bar and java apps seam to have probs with that. When your eclipse doesn’t want to make use of it check out this post: https://blog.matto1990.com/2011/04/using-eclipse-under-ubuntu-11-04-natty/
Not running the unity desktop yet? Try it in your VirtualBox and follow these steps to enable the 3d support for unity: https://www.webupd8.org/2010/12/how-to-test-ubuntu-1104-with-unity-in.html