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I too have been getting somel "socket error - Receive Errors" which disconnects me from the pool, and then it reconnects on it's next attempt to connect 10 seconds later.  I'm using XMR-STAK on port 3033.  I wouldn't say the disconnects are not that frequent but  more sporadic than anything but I've usually seen a couple follow each other a couple minutes apart and then it seems to be working fine again until the next time.  Doesn't seem to affect much to me other than some time lost.