Ahh, the list is ever growing thanks to contributions posted by others. I have updated the list of bugs when switching to IE=9 or IE=edge in a SharePoint master page. Go to the bug list.
I have come across a couple of more bugs when switching to IE=9 or IE=edge in a HTML5 SharePoint master page. Go to the bug list.
I recently refreshed my Just the Essentials SharePoint 2010 master pages and a part of that refresh included the addition of HTML5 versions of the master page files. In this post I am going to step through how to convert a SharePoint 2010 master page to HTML5. Continue reading Convert SharePoint 2010 master page to HTML5