Bug found in Authentication Service

Found thousands of these in the Error logs .
2013-02-14 16:05:16,313 [220] Orchard.ContentManagement.DefaultContentManager - NullReferenceException thrown from IContentHandler by Orchard.Core.Common.Handlers.CommonPartHandler
System.NullReferenceException: Object reference not set to an instance of an object.
   at ActiveDirectoryAuthorization.Services.ActiveDirectoryAuthenticationService.GetAuthenticatedUser()
   at ....