Object Visibility not updated in viewport

[lrm 33]

I have added a visibility track to an object in 3DS Max 2012. It renders correctly but does not automatically update in the viewport during playback. I can get the viewport to update correctly by stopping at a frame and keying in Ctrl+a (select All) then Ctrl+d (unselect all). Animations I created in earlier versions of Max will update correctly in the viewport but new objects which have visiblity changes will not. I have checked the properties of the newly created objects and compared them with old objects and can find no differences. Any suggestions would be appreciated. Thank you. ~Lee

[Cad64 88]

Have you installed the service pack and hot fixes for 2012: http://usa.autodesk.com/adsk/servlet/ps/dl/index?siteID=123112&id=2334435&linkID=9241178