Typo at http://www.w3.org/TR/DOM-Level-2-Events/events.html#Events-flow-capture

Should be stopPropagation. :)

"If the capturing EventListener
<http://www.w3.org/TR/DOM-Level-2-Events/events.html#Events-EventListener>
wishes
to prevent further processing of the event from occurring it may call the
*stopProgagation* method of the Event
<http://www.w3.org/TR/DOM-Level-2-Events/events.html#Events-Event>
 interface.