I had a power outage for a couple of seconds here, and when everything came back up, none of my rigs would connect.  I had to manually start claymore, with the Minerstat client closed (for some reason, if node was running, claymore would close after a minute or two).  I was a bit panicked, thinking that the power outage had messed something up on my end, so I was relieved when I realized it was the minerstat site.

Between the issues that Nicehash had, the flash crash on Ether today, and now this, it's been a tough day for mining.