Rule #1 - Be Patient - Rule #2 - Don't ask when, if you don't contribute - Rule #3 - You have coding skills - LinuxMCE's small brother is available: http://www.agocontrol.com
How did you install? DVD or CDs? Did you change drivers?I have discovered for me that if I start fiddling everything disintegrates fast the more I try to fix. I keep my media on a separate disk and I can install from the DVD fast. Most of the backup/restore works so the pain isn't great. You will need to manually reinstall any floorplan images. There may be a few other small things to check for.
First, which Orbiter version? (UI1 UI2 overlay or UI2 Blended?)Second, can you see anything through the orbiter? (UI2 only, UI1 blocks everything)Third, do you hear the audio playing?Not that this would necessarily fix it but I would go to the media director panel in web admin and try other relevant video driver selections. Sometimes it may just reload things in the right order.