IBM Lotus Notes Traveler before 8.5.1.3, when a multidomain environment is used, does not properly apply policy documents to mobile users from a different Domino domain than the Traveler server, which allows remote authenticated users to bypass intended access restrictions by using credentials from a different domain.
http://www-10.lotus.com/ldd/dominowiki.nsf/dx/Lotus_Notes_Traveler_851_FP3_Release_Notes