I\'ve built a entity framework model against a 2008 database. All works ok against the 2008 database. When I try to update the entity on a 2005 database I get this error.
We had this error on SQL2005 v.3, where we did not have it on SQL2005 v.4.
Adding SQL2005 to the connection string fixed our specific problem.
We haven't identified why yet, and did not want to modify code to provide the token as solved above (issue manifested during deployment).