SP2010 SP1 + IE9 - Namespace prefix 'xsd' is not defined

Hi,

There is a thread about this issue but is marked as answered and I still have the problem.

To reproduce edit a list item with a people editor field using IE9 and a masterpage with meta tag <meta http-equiv="X-UA-Compatible" content="IE=Edge" />

This post has all the details and one of comments points to the method Microsoft.SharePoint.WebControls.EntityEditor.ParseSpanData(String spans)

Can someone please confirm if this is a SharePoint bug?

Thanks.