I updated to 1.01, and now whenever I start a battle of any kind my screen is filled with error messages and I start out with my health at 1. I also cannot change equipment in multiplayer.

Same for me, on a different note, do the people behind this patch actually test the shit they make, like have they started the game and played it before they charge us money for it?

I actually discovered now that I had to also update my Warband base game. I do think it would be nice if the whole DLC would have just worked fine from release though.