Krono89

I'm getting the following when logging into a fresh Tekkit 1.2.7b server with the 1.2.7b client. I haven't had any prior versions of Tekkit installed ever, I put the server together literally just now, and it has never had minecraft of any kind installed, and the desktop I am trying to connect from also has never had minecraft/tekkit ever installed. Literally have no idea what's going on here. ID 102 is mismatched between world and game. ID 335 is mismatched between world and game. ID 79 is mismatched between world and game.