I think I know what that person is talking about. In the default Orbiter 2010 (Patch 1) installation, if you go to the Delta-glider folder and select Cape Canaveral, the description says, "A Delta-glider, parked at the visitor parking lot of the Kennedy Space Center -
ready for takeoff."
However, the Delta-glider is parked at a landing pad and there is no taxiway to the Runway.
I've wondered about this myself. (I figured out a way around it ... I opened some other scenario file that had a Delta-glider already parked at the Runway ... and copied the data out of it and pasted it into the Cape Canaveral scenario file.) From what I remember, that worked.
If that Cape Canaveral scenario is buggy (as it appears to be), it would be preferable to have it fixed in some upcoming release. IMHO. (Why have a buggy scenario in the default system?)