Extreme failure of Text file - tag on UTF-8 :(

When on a WMA track file I use Text file - Tag with a UTF-8 textfile, international characters are garbaged:

What's up??

Does the file contain a byte order marker?
This is needed by Mp3tag to recognize the encoding.

Does the file contain a byte order marker?

No.

This is needed by Mp3tag to recognize the encoding.

Thanks.