Hi,
Here is what I have found so far:
  1. Autocreated function for load event of Ext.tree.Panel has next: function(treepanel, records, successful, operation, options), but according to real test and comment of rharbers here http://docs.sencha.com/ext-js/4-0/#!...nel-event-load should be something different
  2. Should the type of collapseDirection be really boolean http://docs.sencha.com/ext-js/4-0/#!...lapseDirection