In the Beta 2 Build Notes and What's New you will see reference to this change...
The example login dialog instance itself has the new property set to false to allow it to work correctly before the user is logged in. You need to set it to false in your own login dialog instances.The default security rules have been improved where views now require the user to be logged in by default. This depends on the combination of the peLoginMode property of the cWebApp object and a new property pbLoginModeEnforced available on each view. This pbLoginModeEnforced property defaults to true and needs to be set to false for views that do not require a login when peLoginMode is set to lmLoginRequired.