[VE][html5] http-equiv="X-UA-Compatible" should be valid

I'm not sure why this error comes up. This http-equiv value has been around for at least a few years and seems like it should be valid.

Bad value X-UA-Compatible for attribute http-equiv on element meta.
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">

Received on Monday, 23 May 2011 09:57:56 UTC