Here's a screen grab of me editing such a playlist.

What do you get? Do you get garbled strings, or do you get some kind of "blank" character indicating that the fonts your Java is using don't have the required characters? If the latter, you probably need to configure Java to use different fonts. I'd offer some advice, but I've never had this problem, and fonts are generally very platform dependent (you didn't say what platform you're using; someone else may be able to offer help if they have this information).