I'm seeing very frequent disconnects at the moment.

The proxy is able to reconnect instantly and workers resume (coin switch) - the shares that were mid-processing during the switch all seem to get trashed, typically with "share is above target." (wrong difficulty?)

My rejected rate is up to 19%.

2013-12-29 08:55:03,487 INFO proxy mining_proxy.on_disconnect # Disconnected from Stratum pool at middlecoin.com:3333
...
2013-12-29 08:59:14,937 INFO proxy mining_proxy.on_disconnect # Disconnected from Stratum pool at middlecoin.com:3333
...
2013-12-29 09:07:03,900 INFO proxy mining_proxy.on_disconnect # Disconnected from Stratum pool at middlecoin.com:3333
...
2013-12-29 09:09:14,483 INFO proxy mining_proxy.on_disconnect # Disconnected from Stratum pool at middlecoin.com:3333

Been going on for hours in my logs.