In the last game I was playing on live tonight I got a "game drawn: insufficient material" when I was up a rook, a queen, and 4 pawns against a lone king.  Does anyone know if this is a new bug for live chess? 

Did you run out of time?

If you run out of time and your opponent cannot checkmate you by any possible sequence of legal moves (i.e with a lone king) the game is drawn (in which case you got lucky).

Otherwise, it is a bug.

I must've run out of time.  Your explanation seems like the obvious one which of course did not occur to me.

Oops.