Whenever you load a scenario that has focus inside an UMMU which is close to a vessel, Orbiter CTD's.
I have a clean install of Orbiter2010, with OrbiterSound 2010, UCGO(and UMMU) 2010, and Ravenstar 2010
Follow these steps to recreate the CTD:
1 - Load the Delta-Glider Cape Canaveral scenario...