How to solve "A required anti-forgery token was not supplied or was invalid."

Put a machine key in your web.config file.


How To: Configure MachineKey in ASP.NET 2.0
http://msdn.microsoft.com/en-us/library/ff649308.aspx

RavenHQ and ASP.NET MVC on AppHarbor

http://www.dotnetcurry.com/ShowArticle.aspx?ID=808

Clean up your MVC app with SignalR

http://www.novanet.no/blog/yngve-bakken-nilsen/dates/2012/7/clean-up-your-mvc-app-with-signalr/

Clean controllers, readable Javascript and real time

How to put meta tag into Orchard theme?

In layout.cshtml file, add following code:
@using (Script.Head())
{
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
}

How to avoid compatibility view and quirk mode in IE?

Add this header into IIS setting, HTTP Response headers
<meta http-equiv="X-UA-Compatible"content="IE=edge">

In IIS 7




http://weblogs.asp.net/joelvarty/archive/2009/03/23/force-ie7-compatibility-mode-in-ie8-with-iis-settings.aspx