Errors regarding CSS3 Paged Media

Hello,
 
The validator reports that the page margin property doesn't exist and
seems confused by a page margin box declaration.
 
I refer to this result:
http://jigsaw.w3.org/css-validator/validator?uri=http%3A%2F%2Fwww.savage
creek.net%2FCSS%2FTest%2FPage%2Fpm0305-cntreset-01-b.htm&warning=2&profi
le=css3&usermedium=all.
 
Best wishes,
 
Melinda
  _____ 

HP  -   Melinda Grant
Connectivity Standards 
Consumer Printing and Imaging
+1 (541) 582-3681
melinda.grant@hp.com   
  _____