I got an issue with the tree in IE 11.
I can't get the context menu working.
_397 is null
function _37f(_396,_397,_398){
var t=$(_397);
if(_398){
t.addClass("menu-item-disabled");
if(_397.onclick){
_397.onclick1=_397.onclick;
_397.onclick=null;
....
Edit: 1.3.4
Edit2: Typo in one of my sublibraries