Scanners on bwscan+moria sometimes don't make progress
Scanner 3 is still stale.
WARN[Sat Aug 27 22:40:12 2011]:Bandwidth scanner scanner.3 stale. Possible dead bwauthority.py. Timestamp: Wed Aug 24 17:11:27
Note the bwscan vm is running sqlalchemy 0.5.6 still. Perhaps we should just upgrade to 0.7.1 and restart?