I have the same problem but with a non-LAN moded server, i see it open in the selection menu, then get the "failed to synchronize registry data, closing connection" error message, then back to the server selection menu the server is pinging.. i only get the error message when i try to connect to the server for the first time after launching minecraft.
I have the same problem but with a non-LAN moded server, i see it open in the selection menu, then get the "failed to synchronize registry data, closing connection" error message, then back to the server selection menu the server is pinging.. i only get the error message when i try to connect to the server for the first time after launching minecraft.