I still get this error when multiple users are logged in... at least for the second user opening the client.
[02/02/17 14:27:27] ccnet_register_service_sync: Bad response for register service seafile-dummy-service: 516 The service existed[02/02/17 14:27:27] seaf-daemon.c(505): Failed to bind ccnet service
[02/03/17 09:29:47] ccnet_register_service_sync: Bad response for register service seafile-dummy-service: 516 The service existed[02/03/17 09:29:47] seaf-daemon.c(505): Failed to bind ccnet service
[02/03/17 13:57:32] ccnet_register_service_sync: Bad response for register service seafile-dummy-service: 516 The service existed[02/03/17 13:57:32] seaf-daemon.c(519): Failed to bind ccnet service
Thanks, Tobias