found here: http://stackoverflow.com/questions/2713542/bug-in-jquerys-element-creation

$(document).ready(function(){

var fun=function(){

alert('fired');

};

var parms={

'id': 'sth',

'text': 'click',

'click':fun,

'data': {

'somedata': 'somedata'

}

};

var _new_li = $('<li/>',parms);

_new_li.appendTo($("body"));

});

After clicking on the li element error is thrown

e is undefined in jquery line 1919

var events = jQuery.data(this, "events"), handlers = events[ event.type ];

events is undefined.

jquery overwrites events stored in data.

It probably should extend.