If that screen shot is from only 6 hrs since starting then I would keep an eye on that miner.  That board specifically.  I have seen over time error rates climb on weak boards with more hardware errors.  Take note of which miner this is and then just remember if you start seeing issues where that miner crashes then focus on that board.

Like other said it may not be an issue, but I don't like to see a number that high after only 6 hours.