これは10年前のブログ記事であるため、古い情報である可能性があります。
Windows encoding issues
There is an encoding bug in our windows client that mostly affects users with non-english system language. Those who are affected will get an error similar to this:
ascii codec can't decode byte 0xYY in position XXX: ordinal not in range (128)
Users getting this error should download and install a patched version which fixes the problem.