function fireEvent_DOM throwing "element.dispatchEvent is not a function" #333

Uncaught TypeError: element.dispatchEvent is not a function
at fireEvent_DOM (prototype.js:7141)
at fire (prototype.js:7130)
at HTMLDocument._methodized [as fire] (prototype.js:456)
at HTMLDocument.fireContentLoadedEvent (prototype.js:7317)

Prototype.js build version 1.7.3

event.js getFireTarget expects a HTMLElement. fire should not wrap element in JQuery object.