00000002() GetHTMLFormElementProperty(JSContext * 0x011cbb60, JSObject * 0x01785bc8, long 24662876, long * 0x0012fab4) line 257 + 29 bytes js_GetProperty(JSContext * 0x011cbb60, JSObject * 0x01785bc8, long 18836768, long * 0x0012fab4) line 1602 + 131 bytes js_Interpret(JSContext * 0x011cbb60, long * 0x0012fc2c) line 2089 + 912 bytes js_Invoke(JSContext * 0x011cbb60, unsigned int 1, int 0) line 646 + 13 bytes js_CallFunctionValue(JSContext * 0x011cbb60, JSObject * 0x01784228, long 24662856, unsigned int 1, long * 0x0012fd4c, long * 0x0012fd54) line 732 + 15 bytes JS_CallFunctionValue(JSContext * 0x011cbb60, JSObject * 0x01784228, long 24662856, unsigned int 1, long * 0x0012fd4c, long * 0x0012fd54) line 2257 + 29 bytes nsJSEventListener::ProcessEvent(nsIDOMEvent * 0x011c99a0) line 98 + 34 bytes nsEventListenerManager::HandleEvent(nsIPresContext & {...}, nsEvent * 0x0012fe20, nsIDOMEvent * * 0x0012fdf8, nsEventStatus & nsEventStatus_eIgnore) line 485 + 17 bytes GlobalWindowImpl::HandleDOMEvent(GlobalWindowImpl * const 0x011c35c4, nsIPresContext & {...}, nsEvent * 0x0012fe20, nsIDOMEvent * * 0x0012fdf8, unsigned int 1, nsEventStatus & nsEventStatus_eIgnore) line 1408 nsWebShell::OnConnectionsComplete(nsWebShell * const 0x011862b0) line 1658 + 34 bytes nsDocLoaderImpl::LoadURLComplete(nsISupports * 0x01196660) line 730 nsDocumentBindInfo::OnStopBinding(nsDocumentBindInfo * const 0x01196660, nsIURL * 0x011966c0, int 0, const nsString & {""}) line 1153 OnStopBindingProxyEvent::HandleEvent(OnStopBindingProxyEvent * const 0x0120d670) line 536 StreamListenerProxyEvent::HandlePLEvent(PLEvent * 0x0120d674) line 418 + 12 bytes PL_HandleEvent(PLEvent * 0x0120d674) line 395 + 10 bytes PL_ProcessPendingEvents(PLEventQueue * 0x01146720) line 357 + 9 bytes _md_EventReceiverProc(void * 0x0059037e, unsigned int 49277, unsigned int 0, long 18114336) line 675 + 9 bytes USER32! 77e71250()

Seems to work fine. Probably fixed as a result of recent DOM/form/event revamp.

Page loaded properly for me with Dec3a so marking verified as fixed.