I have not had a chance to

[SJMaye]

I have not had a chance to try the registry changes yet.  Since then I was trialing RecordedTV HD and had a similar problem with a border.  In trying to resolve the border I read a post on the RecordedTV HD forum.  They mentioned using the exact same registry fix which assured me they were not aimed only at TotalMedia Theatre, but at all MC applications and screens. 

Then there was another post stating that the border thing happens anytime you select TV/Rear projection TV during TV setup in MC.  The comments said if you select monitor or flat panel display it has the same effect as the registry fixes.  And it appears to be true.  Borders were eliminated.