ZF-8228: Zend_Navigation_Page->hashCode() does not allways return a unique ID
This method uses spl_object_hash($page) which does not allways returns a unique id.
@see comment from 05-Jul-2007 on php.net/spl_object_hash
It's hard to reproduce this error, because it depends on PHPs memory usage/handling.
I noticed it when i tried to add some Pages with $aPageInMyNavigation->addPages(...);