I've got the same problem, already tried to delete rgl_config, to download the TW-Version of M&B:Warband (I've got now Steam and Retail version) and all that with the .210 Version (downloaded from Rapid, from Mega and also the mbrepro download), all variations are crashing when i try to join a server, even with fresh rgl_config (also default settings, 640x800...and so on).