I have English version of the game with Russian patch installed. I haven't reach to far in game, but so far no problems with the game. I think the patch works ok
I have to admit it would be cool to have 1.6.4 patch on the English part of KB:L site, with English menu. Having to download it from the Russian part of the site with a lot of "?????????????????" during patching is really annoying and leads to a lot of confusion, at least among my friends who play this fantastic game with me.