title: NSRunLoop freezes with NSTimer and any input
body: <p>For some reason when I push down (click and hold) on any control, the NSTimer in my App freezes and does not fire until I release the mouse button.  It simply does not fire while I have the mouse pressed.  This is fine for short periods, but it also freezes if I have a popup menu open, or a combobox dropped down.</p>
  
  <p>I'm not sure if there is something I missed, but it seems like this is incorrect behavior.</p>
  
  <p>I want to be able to click the down arrow of an NSPopUpButtonCell (or even click and hold an NSTableView) without the entire NSTimer freezing (which redraws an NSView).</p>
  
  <p>Any comments / suggestions would be appreciated. </p>
  
  <p>The NSTimer is added to the currentRunLoop with mode NSDefaultRunLoopMode.</p>