In Eclipse Indigo, zkstudio with zk-bin-6.5.0 package

I have the following code:

<?page title="ZK RDBMS" contentType="text/html;charset=UTF-8"?>
<zk>
<style>html, body

{border: 0px; margin: 0px; padding: 0px;}

</style>
<borderlayout>
<north collapsible="true" splittable="true" title="North">
<label value="aaa" />
</north>
<east collapsible="true" splittable="true" title="East" />
<center />
<south collapsible="true" splittable="true" title="South" />
<west collapsible="true" splittable="true" title="West" />
</borderlayout>
</zk>

If we rotate from vertical to horizontal when we collapse the north and then click on it to open:
https://www.dropbox.com/s/yrr9h4jk35vzu8s/IMG_0049.PNG

If we rotate from horizontal to vertical, same, after clicked to open the collapsed north area:
https://www.dropbox.com/s/mfvhggqa9rmqg65/IMG_0050.PNG