JDBC Connection broken (followup)

Oh, tried this with Windows firewall off, and AV off too. Here's the logging of the last few successful, and then the
unsuccessful....

2009-08-17 00:56:58 PDTLOG:  00000: connection received: host=127.0.0.1 port=3233
2009-08-17 00:56:58 PDTLOCATION:  BackendInitialize, .\src\backend\postmaster\postmaster.c:3205
2009-08-17 00:56:58 PDTLOG:  00000: connection authorized: user=mjb database=retain
2009-08-17 00:56:58 PDTLOCATION:  BackendInitialize, .\src\backend\postmaster\postmaster.c:3283
2009-08-17 00:56:58 PDTLOG:  00000: disconnection: session time: 0:00:00.016 user=mjb database=retain host=127.0.0.1
port=3233
2009-08-17 00:56:58 PDTLOCATION:  log_disconnections, .\src\backend\tcop\postgres.c:4024
2009-08-17 00:56:58 PDTLOG:  00000: connection received: host=127.0.0.1 port=3234
2009-08-17 00:56:58 PDTLOCATION:  BackendInitialize, .\src\backend\postmaster\postmaster.c:3205
2009-08-17 00:56:58 PDTLOG:  00000: connection authorized: user=mjb database=retain
2009-08-17 00:56:58 PDTLOCATION:  BackendInitialize, .\src\backend\postmaster\postmaster.c:3283
2009-08-17 00:56:58 PDTLOG:  00000: disconnection: session time: 0:00:00.000 user=mjb database=retain host=127.0.0.1
port=3234
2009-08-17 00:56:58 PDTLOCATION:  log_disconnections, .\src\backend\tcop\postgres.c:4024
2009-08-17 00:56:58 PDTLOG:  00000: connection received: host=127.0.0.1 port=3235
2009-08-17 00:56:58 PDTLOCATION:  BackendInitialize, .\src\backend\postmaster\postmaster.c:3205
2009-08-17 00:56:58 PDTLOG:  XX000: could not receive data from client: An operation was attempted on something that is
nota socket.      
2009-08-17 00:56:58 PDTLOCATION:  pq_recvbuf, .\src\backend\libpq\pqcomm.c:769
2009-08-17 00:56:59 PDTLOG:  08P01: incomplete startup packet
2009-08-17 00:56:59 PDTLOCATION:  ProcessStartupPacket, .\src\backend\postmaster\postmaster.c:1469