it works,thank you^_^u english is very great,ha

version:1.3.3

file path: demo/layout/full.html

add this code

<div data-options="region:'center',title:'Center'">
          <div id="p" class="easyui-panel" title="My Panel" style="width:500px;height:1500px;padding:10px;background:#fafafa;" data-options="iconCls:'icon-save',closable:true,collapsible:true,minimizable:true,maximizable:true">
            <p>panel content.</p>
            <p>panel content.</p>
         </div>
   </div>

if u collaps the west layout and uncollaps it , the add's panel vertical direction scroll is miss...

中文：
恳请作者帮忙解决，我在项目里发现这个问题，当收缩再恢复左边的布局的时候，中间面板的竖直方向滚动条就消失了。求解决。我的英文不是很好，所以又写了中文。