i believe the default attack mode is 0 when not specified. however, the same command, hash list and wordlist runs fine in linux. i do agree it probably has something to do with the wordlist. haven't had a chance to mess with it yet. but the original file seems to already be utf-8
$ file -I wikipedia-wordlist-sraveau-20090325.txt
wikipedia-wordlist-sraveau-20090325.txt: text/plain; charset=utf-8
$ file -I wikipedia-wordlist-sraveau-20090325.txt
wikipedia-wordlist-sraveau-20090325.txt: text/plain; charset=utf-8