The "text-justify: newspaper;" has been dropped, apparently, in
favor of using either number values or various new other new values.
text-justify: newspaper; (or using any of the new named values)
with any of the named values, or the "old" newspaper value, the
CSS Validator reports
"Property text-justify doesn't exist : newspaper" (or any of
the new named values).
Is the validator database simply not updated? Or is there another issue
I've clearly overlooked?
The text-justify property is proposed in the working drafts of the CSS3
text module. The newspaper value for that property is not inlcuded in
the newest working draft of that module.
Also you should be aware that the support for CSS3 in the validator is
incomplete. If I remember correctly, there are some bugs in the CSS2.1
support as well.