Hi.
I haven't had this problem before, but since I am using Amarok 2.1 it changes Polish letters (not in every song) in tags to "?"
Tags are fine when I open it in KID3, but Amarok changes it. I don't know where is the problem. It doesn't depend on type of file: it's either mp3 or flac.

Please help how to fix it.

I noticed a similar issue with greek characters in Amarok 2.1.1 (using kde 4.2.4 from Debian Sid and Amarok 2.1.1 from Debian experimental repositories). I have a few greek albums in my collections and some of them appeared normal in the collection while others appeared as .