What does this mean, please.

"Roerig, Larry" <[email protected]>
Newsgroups gmane.org.w3c.validator.css
Message-ID <[email protected]> 
 125   Property xfa-spacerun doesn't exist : yes yes

 

And the next line

 

125   Property xfa-spacerun doesn't exist : yes yes

 

The error is repeated but I have no clue what I should fix.

Please help.

Thank you,

Larry
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