In the comments for this show, it says: "Sugar Magnolia > U.S. Blues > Sunshine Daydream is listed as theencore, but there is only 35 seconds between Around and Sugar Magnolia - itsdoubtful they ever left the stage * Sunshine Daydream is either missing or was notplayed; either way it did not segue from U.S. Blues - there's at least 21 seconds of'dead-air' immediately following U.S. Blues * (1) ??? tuning"
I've just finished listening to the FM broadcast version of the show, and Sugar Magnolia is definitely the encore. There is a four minute break between it and the end of 'Around and Around,' and the radio host notes that the crowd is very loud, so the Dead would almost certainly be coming back to play an encore. The segue between 'Sugar Magnolia' and 'US Blues' isn't a true >, either. There's about a second between songs. And you're right about 'US Blues' > 'Sunshine Daydream': there's no real connection there. But, there is definitely an SSDD in this show, and it's in the SBD source you list. Anyway, thought you should know about the encore. Jonathan