Upgrading to Jackalope

The new version 9.04 of Ubuntu is out. I followed http://www.shivaranjan.com/2009/05/01/ubuntu-linux-how-to-upgrade-to-ubuntu-904-jaunty-jackalope-from-ubuntu-810-intrepid-ibex/ to upgrade. Now this was some time back, and now I vaguely remember initially I had some sound problems. Other than that, it has been running just fine without any problems whatsoever.