The stratum servers will be getting restarted in 30 minutes (12:30 PM, PST) in order to deploy a fix.  bfgminer 4.1+ added TLS to Stratum as the default even though it was never a part of the protocol, and this ended up causing connections to hang for 1 minute+ when trying to connect to BTC Guild, and sometimes simply failing entirely.

The restart will only take a second to complete, but check your miners if they stop working, since historically there have always been certain miners which can't handle a disconnect properly.


EDIT/UPDATE:  Restart completed, everything appears to be working as expected.