I\'m upgrading a big web site project from Visual Studio 2010 to 2012. Throughout my project, I have table elements with the runat=\"server\" attribute
Yes Its a bug in Visual Studio 2012,Applying the patch from below mentioned link has worked for me:
http://www.microsoft.com/en-us/download/details.aspx?id=36359
Removing the tag won't solve it out for a current/migrating running project. In that way we have to change each and every aspx page.