When drag&dropping an item to the top-most position, I sometimes get the following error:
Return! <br />
<b>Warning</b>: DOMNode::insertBefore() [<a href='domnode.insertbefore'>domnode.insertbefore</a>]: Hierarchy Request Error in <b>/home/httpd/vhosts/access4all.ch/subdomains/epubeditor/httpdocs/models/Book.php</b> on line <b>756</b><br />
OK
When drag&dropping an item to the top-most position, I sometimes get the following error: