i get exactly the same error (and with my english translation files a few more) it translates into something along the line of a cache would speed things up its nothing to worry about. As i say the english files i have created genereate a lot of errors but the game doesnot apear to be phased by it (played for two hours the other day no problems) a very robust little server cant waitt to get my grubby paws on 1.9