After I did a re-install (due to the recent upgrade and the /Work folder mentioned on other forums) I switched the resolution to the basic 800/600/60Hz and it seems to be working. I also looked closer, and the video card is just some on-board video. But now I'm not so sure it's a video-card issue. I'm able to get to the Pluto menu with lighting, media, climate, telecom, security and the lower menu, but there is a grey margin along the left and the right of the pluto screen, and the security icon is flashing as are the two users' icons in the telecom row. So anyway, although it looks odd, it's semi-functional, but when I go to the MythTV Player, the full screen is used and it looks fine. Despite having the grey margins, it looks like mouseclicks are still full-screen, so clicking in the area to the left of the telecom icon actually clicks the telecom button, same with clicking to the right of icons along the right side of the screen... looks like the graphics are compressed horizontally, but the clicks are still using the normal full-screen.
Another wierd thing, the sub-screens, like the security screen, all have a black region that flickers and in the upper right over the Home icon is a red circle with a red line through it (like some sort of 'prohibited' icon).
Anyway, things are getting better, but aren't there yet.