I previously setup mythtv (svn release) on another box, and have loaded all my media files(video,audio, etc) on to it. I configured it and attempted to connect(expecting much delight) , but the error says I have protocol version 40 and LinuxMCE uses 31. After downloading the current release version, resolving dependancy, etc still not happy. This time its the db schema version. A couple more hours of downloading and compiling and I got the frontend to work. However, I can't tell LinuxMCE that the world viewable share name is \\mythdvr\sharename (and specify user/pass) so it can't actually play the files. I read that you put a wrapper around mythtv so direct upgrade using (svn and svn update) may not be possible, but is still is desirable. However, implementing a much newer mythtv is possible. Also because of the wrapper the main interface still uses the old version. Darn!!
Also RC1 was release on April 28, why is it not using the new ubuntu version 8.04 because kubuntu is obviously based on ubuntu. Some kind of forward compatibility would be nice, possibly using "create view" to create a compatible view of the databases. Otherwise all frontend and backends have to be identical versions, and I not rolling my version back to some version that an archaeologists dug up.