Connect times out on Android

websocket-sharp is working perfectly for me in the Unity editor and on iOS, but on Android, Connect() always times out before receiving a handshake. In the logs of my WebSockets server, I can see the Unity client connecting, and the handshake completes immediately from the server's point of view. On the Android side, however, my app hangs for awhile before finally reporting a timeout:

03-17 17:53:35.831  19580-19596/tv.rockscience.RockScience2 D/Unity﹕ 03/17/2015 17:53:35|FATAL|WebSocket.acceptException:0|WebSocketSharp.WebSocketException: A timeout has occurred while receiving a handshake.
            at WebSocketSharp.WsStream.ReadHandshake[HandshakeResponse] (System.Func`2 parser, Int32 millisecondsTimeout) [0x00000] in <filename unknown>:0
            at WebSocketSharp.WsStream.ReadHandshakeResponse () [0x00000] in <filename unknown>:0
            at WebSocketSharp.WebSocket.receiveHandshakeResponse () [0x00000] in <filename unknown>:0
            at WebSocketSharp.WebSocket.sendHandshakeRequest (WebSocketSharp.HandshakeRequest request) [0x00000] in <filename unknown>:0
            at WebSocketSharp.WebSocket.sendHandshakeRequest () [0x00000] in <filename unknown>:0
            at WebSocketSharp.WebSocket.doHandshake () [0x00000] in <filename unknown>:0
            at WebSocketSharp.WebSocket.connect () [0x00000] in <filename unknown>:0

I'm running Unity 4.6.3f1 Pro with both iOS and Android Pro, with a minimum Android API level of 4.0.3 and full .NET 2.0 compatibility level, using the websocket-sharp.dll from the Asset Store. I'm testing by exporting a development build as a Google Android Project and running it on my Android device with USB debugging from Android Studio.

Have you success reports from people using websocket-sharp on Android? I'm only using the client stuff, not the server.

Start by reproducing the timeout in the Android Unity build and compare the server handshake log with the client stack trace. Read WsStream.ReadHandshake, ReadHandshakeResponse, and WebSocket.receiveHandshakeResponse; done means the Android client receives and accepts the handshake instead of timing out.