- start instance 1 in DataDir_1 listening on port 8333 -> OK
- start instance 2 in DataDir_2 listening on port 8333, too -> hard crash of instance 2 after message that client could not be bound to port 8333
From the debug.log of instance 2: 04/29/12 22:06:48 EnvShutdown exception: DbEnv::close: Invalid argument (22)
No further GUI exception was displayed at all, as I wrote a hard crash! Guess this is something for @sipa / @laanwj.