jquery.easyui.min.js 展现树的bug，来看看

jquery.easyui.min.js 展现树的bug，高手进来看看。
用下面那个json，展现树，节点展开时，会死循环，子节点展开后，又是这棵树，然后可以无穷展开，到最后浏览器崩溃。
后来实验发现，只有把节点的 "iconCls":"icon-phonebook", 去掉。才能正常显示。"state":"closed"属性指定，也是这个问题。有碰到这个问题的朋友么？

JScript code

[{        "id":"01",        "text":"System Manager",        "state":"closed",        "children":[{                    "id":"02",                    "text":"User Auth Manager",                    "iconCls":"icon-phonebook",                    "state":"opened",                    "children":[{                                "id":"003",                                "text":"Menu Manager",                                "state":"closed"},                                {                                "id":"004",                                "text":"Role Manager",                                "state":"closed"},                                {                                "id":"005",                                "text":"User Manager",                                "state":"closed"},                                {                                "id":"006",                                "text":"User Au manager",                                "state":"closed"}]},                    {                    "id":"07",                    "text":"Dept All Manager",                    "iconCls":"icon-phonebook",                    "state":"opened",                    "children":[{                                "id":"008",                                "text":"Dept Manager",                                "state":"closed"},                                {                                "id":"009",                                "text":"Job Manager",                                "state":"closed"},                                {                                "id":"010",                                "text":"Title Manager",                                "state":"closed"}]}]}]