LinuxMCE 0810 will have the MythTV version that is part of Kubuntu 0810.
dcerouter_101777:~# aptitude show mythtv|grep Version
Does Kubuntu use old versions od software or does it update it? I use Fedora so I'm not used to Ubuntu way of doing things but for Fedora 10 there there will be an update to latest MythTV as it comes available...
So for Fedora 10 current version of MythTV is 0.21 but when new MythTV comes out it will be available in Fedora 10. So will then also new MythTV be available also in Kubuntu?
Do a little research on your own.
As a hint take a look at www.mythbuntu.org
There are 0.22 repos that you may enable that should work under kubuntu 0810 too. (they do not work good at the moment)
Bear in mind that the protocol lmce use to control myth frontend may have changed, which mean it will not work correctly.
There is probably several month left before 0.22 will be released or which version number ti will end up having at release time.
Why do you need 0.22 except for vdpau? ( I know there are several other fixes...)
Re "does kubuntu use old version".
They will use the version available at the time of release.
No major version upgrades is done within the same release.
Most likely kubuntu 0904 will still have mythtv 0.21+fixes at release time.
With kubuntu 0910 it have probably changed if mythtv 0.22 is relased at that time.