When selecting multiple files, the selection-boxes for 'Title', 'Artist', 'Album', etc. all have '' as default, instead of ''
(I have set the language to English during setup)
So, when saving the tags, all data (artist, album, title, etc) becomes "".
So, the solution is (I guess) that the selection-boxes should not contain the German counterpart of '' when using a non-German language, as this is not being recognized as a special word.
Windows 2K, english.