Abstractions in the same directory as main patch, in .mxt format. Opening main patch in Max4, Max5, or Max6.0.5: no problem. Opening in Max6.0.8: error "newobj: [abstraction]: No such object. Opening abstraction independently: no problem. Experienced this problem on two different MacBookPro machines so far, one running OS 10.6, one running 10.7. Tested with multiple patches; a small test patch is attached.