For v4.0 OOB RC we decided to take over application/json globally when the user calls EnableOData. We need a better solution for RTM. Either we don't do application/json by default or we scope it to OData-related controllers only.
Comments: Fixed by moving to per-controller formatters: http://aspnetwebstack.codeplex.com/SourceControl/changeset/d9463be0f715
Comments: Fixed by moving to per-controller formatters: http://aspnetwebstack.codeplex.com/SourceControl/changeset/d9463be0f715