if you have a java compiler and feel like getting your hands a little dirty, before I do a full release, in mschrag.empeg.protocol.NetworkEmpegDiscoverer you can change the discover(int) method to:

  public void discover(int _timeoutMillis) throws IOException {
    if (myInetAddress == null) {
      if (mySock == null) {
        mySock = new DatagramSocket(DISCOVERY_PORT);
        mySock.setSoTimeout(_timeoutMillis);
      }

      broadcastDiscoveryRequest();
      waitForDiscoveryRequest(_timeoutMillis);
    } else {
      discover("(unknown)", myInetAddress);
    }
  }

and I believe that will fix your problem