Byte Order Mark still shown as ???

The byte order mark (BOM) is still shown as a sequence
of three  U+FFFD U+FFFD U+FFFD  on result pages under
"Valid CSS information". Most readers will see three
question marks (???) or empty rectangles.

Test page
http://www.unics.uni-hannover.de/nhtcapri/bom.css

http://jigsaw.w3.org/css-validator/validator?uri=www.unics.uni-hannover.de%2Fnhtcapri%2Fbom.css#css