Few days back after restoring the home page we were encountering the error as "SharePoint 2010:The current page has been customized from its template. Revert to template"
Go to SharePoint Designer select v4.master ,
and then click on Check out. Now then right click on the master page and open in
Search for s4-statusbarcontainer. And modify according to below :
<div id="pageStatusBar" class="s4-status-s1">