When you song title or artist name contains a character that you didn't use in the title of the TXT file or the folder name (not sure what it depends on), it is marked incorrect. However, that poses a problem for people who want to display song titles like "Who Knows?" correctly as the ? is a character that is not allowed in a file name. It might be a good idea to not mark songs with special characters in it as incorrect, even if the titles don't match. I'd personally internally compare the folder name with a version of the song title in which all special characters have been replaced by an empty string. That way you can still detect spelling errors.
Logged In: YES
user_id=1556811
Originator: NO
Should be fixed now. Use the SVN or wait until the release of 1.7.0. :)