a invisible linkbutton with fixed width cann't initialize properly in v1.4, such as
<a id= "lb" href="#" class="easyui-linkbutton" data-options="iconCls:'icon-search'" style="width:80px; display: none;">Search</a>
,
its height is enlarged after initialization and showing it, but it works fine in previous versions.
$("#lb").linkbutton();
$("#lb").show();