Rudi,
Couple of questions:
Can't you type the characters at all?
I can type it and it works, if i want the "code Replacement" it dont work (München bekame M?nchen) and any player the same
Or do they get changed to different characters when you view them again after you have saved a file with these characters? I dont know ?
Are you saving XMP information, or just IPTC? only IPTC
In the latter case (only IPTC), it is important to have that character encoding right. On windows use Windows Latin+Euro, for the Mac, the Mac encoding is fine. i have tried it , i use Windows XP