I haven't tested but I'm pretty sure, given the experiences of others here, that the actual cause of my NodeBB breakage was dbsearch 0.0.16, so while it's awkward to be told there are all of these upgrades available, I don't think the problem was nbbpm, just a bad plugin.
Planned Outage (Thursday June 5th, 2014)
Please be advised that there will be a momentary interruption of NodeBB services for a planned upgrade of our hosting routing system.
Expected interruption should not last more than 10 minutes.
The upgrades are scheduled to take place Thursday June 5th,at 11am EDT
UPDATE The preventative maintenance outage has been postponed to Monday, June 9th, 13:30 EDT