I\'m still relatively new to Rails and Ruby - and after upgrading to the new version of Ubuntu (11.04), my rails installation is not working correctly. I\'ve tried updating Rail
The issue was that rails reverted back to 2.3.5. I had to uninstall rails and set up a gemset as described here: Every time I close terminal rails defaults back to 2.3.5 from 3.0.3?
I'd recommend you take a look at RVM. It is by far the best way to manage installations of Ruby and Rails on the *NIX platforms.