Steps to Reproduce

http://zkfiddle.org/sample/2m2ij5s/3-Select-all-select-group-and-groupfoot
run fiddle
Use the select all checkmark

Current Result

All listitems and listgroups and listgroupfoot are selected

Expected Result

Only listitems should be selected

Debug Info

Listbox / groupsmodel default selection control don't tag listgroup and listgroupfoot as non selectable, even though they are not data items

Root Cause

Workaround

<script><![CDATA[
zk.afterLoad('zul.sel', function() {
var xListbox = {};
zk.override(zul.sel.Listbox.prototype, xListbox ,{
selectAll: zkf= function (notify, evt)

{ for (var it = this.getBodyWidgetIterator(), w; (w = it.next());) if (w._loaded && !w.isDisabled() && w.isSelectable() && !(w.className == "zkex.sel.Listgroup" || w.className == "zkex.sel.Listgroupfoot")) this._changeSelect(w, true); if (notify && evt !== true) this.fireOnSelect(this.getSelectedItem(), evt); }

,
setSelectAll: zkf
});//zk.override
});//zk.afterLoad
]]></script>