Hi,
check if you have got an /etc/apt/sources.list.d/avenard.list file and remove it.
also look for "avenard" in your /etc/apt/sources.list
If nothing there, then do an
apt-get update
apt-get dist-upgrade
If you still have 0.22 then do the folowing :
dpkg -l |grep myth
This will give you a list of all mythtv packages. Then do a :
apt-get install mythweb mythtv-XXX mythtv-YYY
replacing XXX and YYY with all the names beginning with "myth" found in the above dpkg command.
That should then say it is DOWNGRADING all packages to 0.23. The reason is that the 0.22 packages has "higher" numbers.
On my core the list is like this (afterwards) :
# dpkg -l |grep myth
ii libmyth-0.21-0 2:0.21.0+fixes-22228-openglvdpau2-0ubuntu2 Common library code for MythTV and add-on mo
ii libmyth-0.22-0 2:0.22.0-fixes23565-0ubuntu0 Common library code for MythTV and add-on mo
ii libmyth-0.23-0 0.23-0.1 Common library code for MythTV and add-on mo
ii lmce-mythtv-scripts 2.0.0.44.09120322558 <insert up to 60 chars description>
ii mythtv-backend 0.23-0.1 A personal video recorder application (serve
ii mythtv-common 0.23-0.1 A personal video recorder application (commo
ii mythtv-database 0.23-0.1 A personal video recorder application (datab
ii mythtv-doc 0.23-0.1 A personal video recorder application (docum
ii mythtv-frontend 0.23-0.1 A personal video recorder application (clien
ii mythweb 0.23-0.0 An integrated web browser plugin for your My
ii pluto-mythtv-player 2.0.0.44.10062823119 <insert up to 60 chars description>
ii pluto-mythtv-plugin 2.0.0.44.10061723082 <insert up to 60 chars description>
hope it helps.
if not you will have to tell the exact version to install - but more on that if this does not work.
EDIT: Otherwise look in the log below /var/log/pluto on the MD something with *Spawn* to see the mythtv-frontend startup log
Viking