What exactly are you connecting to?
I'm connecting to cdhowie's Apache-MySQL-PHP based mining proxy (last Git version from June 7). It's running on the same machine, and it worked perfectly with older phoenix, including the Git version from October 12 "Fixed issue with immediate disconnects on RPC servers not impl..." What seems to have broken it is the Git update from October 30 "Modify RPCProtocol to use httplib instead of Twisted for persistent HT..."
By the way, I get the problem I described above both for the Precompiled Win32 version and when running the source code directly on 64-Bit Python for Windows.
Thank you for looking into this.