I noticed that some other stuff is covering mythtv, such as notifications (I use Ubuntu notification stack under XFCE because it looks nicer). So this might not be specific to xfce4-panel, in which case it is compiz. But I'm not sure why the same notifications don't cover mythtv under gnome classic session.
I noticed that some other stuff is covering mythtv, such as notifications (I use Ubuntu notification stack under XFCE because it looks nicer). So this might not be specific to xfce4-panel, in which case it is compiz. But I'm not sure why the same notifications don't cover mythtv under gnome classic session.