Other than this minor problem, MythTV is doing everything I want it to do.
Cool, fair enough. Just to recap on my post....this is copied from the wiki.
I upgraded X, Y, and Z and now everything is broken. Help!
The one piece of advice I can most often give Myth users is to keep it simple. Distribution packages, automatic installers, and many other Linux packaging features have made it very easy to get a MythTV system installed by even the most novice MythTV user. This does not mean that you should arbitrarily run apt-get/yum upgrade on a whim and install every package update that is available to you.
MythTV is designed as a PVR appliance, first and foremost. Once it is working, it should be hands off, even for what seems the most innocent of upgrades. As tinkerers, most of us can't resist installing the lastest this, or the newest that. But more often than not, a mass upgrade of every component on your system leads to trouble.
If it ain't broke, don't fix it It may sound simple and foolish, but many people will tell you that once you have your MythTV system working, don't upgrade anything other than the MythTV application unless you absolutely have to. If you want to tinker with the latest of everything, build a slave backend and mess with it there.
One thing that stuck out in one of your above posts..."Watch live tv". With myth your never watching "live" tv.Everything is being recorded,and then played back.Thats why you can time shift in the tv mode.So....I was thinking.
Maybe theres a bit of interlacing going on after a bootup?Do you boot directly into myth,or the U.E desktop?Maybe start the frontend in a window,and then use system monitor to see what is using the most resources?