Mythbuntu is built upon the base of Ubuntu and thus has all the non-gnome specific features of Ubuntu. You can find Ubuntu 9.10 Karmic Koala release notes here

Note: alternate disks are no longer being made. They had a very low take rate, and we feel it’s better to focus our attention on desktop disks.

Head on over to our download page and grab the ISO.

Wondering how to upgrade? See our upgrade page

Features

• Mythbuntu Control Centre – Used to modify settings on a Mythbuntu
  system that are not necessarily MythTV specific.
• Mythbuntu Log Grabber – This app grabs specific log files into a single area and can upload them to pastebin for easy troubleshooting
• Partitioner creates one large partition (EXT4)
• Auto builds (and the Testing PPA) are now easily enabled/disabled via an installable package. They can also be easily configured from within Mythbuntu-Control-Centre. See Auto Builds for details
• MythTV 0.22.0~zrc1 included
• MythTV backend now uses upstart. This allows automatic restarting of the backend in the event of a failure.

New Features in MythTV 0.22

• MythUI support allowing fancier themes
• Support for VDPAU
• MythVideo Storage Groups
• HD-PVR supported out of the box
• DVB-S2 Support
• HDHomeRun Multirec support
• Complete list here: MythTV 0.22 Release Notes

Known Issues

• Many changes have been made to MythTV 0.22. Please read the FAQ
• ISOs do not work in storage groups. See MythVideo 0.22 Transition Guide – Disadvantages
• External Players do not work in storage groups. See MythVideo 0.22 Transition Guide – Disadvantages
• PVR-150 Blaster does not currently work

System Requirements

Seek support via the Mythbuntu forums, and please report any bugs through Launchpad, perferrably by issuing the terminal/shell command “ubuntu-bug mythtv” on your system.