"msapplication-config" - Meta Keyword not registered

When HTML5 verifying www.newsleecher.com ( see verification URL below
) I get the following error :

"Bad value msapplication-config for attribute name on element meta:
Keyword msapplication-config is not registered."

Microsoft recommend using that meta keyword here :
http://msdn.microsoft.com/en-us/library/ie/dn320426(v=vs.85).aspx

Verification URL:
http://validator.w3.org/check?uri=www.newsleecher.com&charset=%28detect+automatically%29&doctype=Inline&group=0
=

Kind regards
  Simon H.

Received on Tuesday, 24 December 2013 09:55:34 UTC