In SharePoint 2010, you will sometimes get a “You must specify a value for this required field” every single time you try to save a page, even the home page of the site. All you’re trying to do is to add a web part, nothing fancy.
Well be careful when you apply custom branding to the site.
It turns out that you cannot comment out Placeholders using <!– –>. Instead you must wrap it around a div with display set to none <div style=”display:none”></div>.