Multiple checkmarks in PopUp Button

  • I have a popup button that I'm setting the menu for and then
    selecting an item programmatically using selectItemWithTitle: -- when
    the user clicks on the popup there are two checkmarks though (as if
    two items are currently selected).  I've verified that all but the
    correctly selected item have state NSOffState (in other words, only
    one item has state equal to NSOnState and it's the one I set
    programmatically).  Is there a  way to flush the state to the view?
    I've tried using display: but that doesn't work.

    Thanks,
    Greg
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