Support for non ASCII characters

[EdwarDDay]

I created an episode with a German umlaut (äöüÄÖÜß). First I had to replace it in the filename, but that's okay.
But then I saw, that also the name of the episode displayed ü instead of ü. Do I need to encode this differently in the episode tags (although I'm not sure how to) or is this a problem with dir2cast?

[ben-xo]

I believe the output is already UTF-8. Which reader does it appear wrong in?