Scenario - Say you're adding bibs using the Fast Add framework from either Cataloging or Circulation, if you select the 'Add and Duplicate' button, you are pulled out of Cataloging (additem.pl) and thrown into Circulation. If you want to duplicate the item...you need to remain at additem.pl to do that, so I think this is a bug. The 'Add Multiple Copies' button works, but you are again thrown into Circulation. Is this behavior fixed by the patch for 6861?
Tested on current master - appears to be fixed.