Cheers, yeah I've seen that happen a handful of times. Odds are it's the two result scrubbing processes running at the same time - you'll notice a similar problem nearly exactly half an hour beforehand. I request read through the match results once every 15 minutes with a cron job (which unfortunately I can't run more often), and then up to once per minute in direct response to site requests. There's a mechanism in place to prevent the two running at the same time, but it may not be working. Bler.
