I get the following error when I try to register a new user, using Identity 2.0 and the default MVC 5 application:
Invalid column name \'Email\'. Invalid col
The reason is you've upgraded to Microsoft.AspNet.Identity.EntityFramework 2.0.0.0 and that changes the user context.
To fix either generate a new db (set a new connection string mdf file) or change the sql table.