Validator incorrectly reports validity for case of font-family _keyword_ that is enclosed in quotes

Test case checked using direct input mode, grammar CSS2 selected:

Test case :

a { font-family:  "Serif"; }


I believe that the above is illegal, if my reading of CSS 2.1 and CSS 2 is
correct, yet the validator reports no error.

Reasoning: CSS2 section 15.2.2 states "Generic font family names are
keywords, and therefore must not be quoted.".


Regards,

Cecil Ward.