Re: "display" property

When trying to validate my stylesheets I get errors because of the use of the "inline-block" value with "display" property. 
Error page incorrectly refers to 1998 W3C Recormendation for CSS2 Specification
( http://www.w3.org/TR/REC-CSS2/visuren.html#propdef-display ), 
which is different from CSS 2.1 Specification 
( http://www.w3.org/TR/CSS21/visuren.html#display-prop )
for valid values of "display" property.

I also found earlier message on this topic:
Date: Thu, 8 Dec 2005 04:48:56 +0100
Message-Id: <A56A33D0-63D6-412B-80A7-F688C6531FF9@mac.com> 

Thanks,
Igor.