Mike - Thanks - I've added this as a bug for our Documentation folks to take a look at.
OMG! I just upgraded from 8.0.6 to 8.1. and suddenly all of our embedded dashboards stopped working. Everything kept throwing up a "The requested URL /0 was not found on this server." error. I have been searching through forum topics for HOURS.
Mike B - You are the man! If I see you at this year's Tableau conference I owe you a beer!