I get this strange exception on a method exit. (DO 3.5 latest public build)

Method is transactional (no attribute explicitely set)

Calling method is [NotTransactional].

System.NullReferenceException occurred
  Message=Object reference not set to an instance of an object.
  Source=Xtensive.Storage
  StackTrace:
       at Xtensive.Storage.TransactionalAttribute.OnSuccess(MethodExecutionArgs args)
       at XXX.XXX.Process()

The very strange thing is this works as expected in another class, but not in this one...