Don't forget your logout action will need to set up the Zend_Auth singleton with the same storage adapter that is used in your login action. If you're using the default storage adapter, then this likely won't apply to you, but if you are using a different one (or especially if you're using a custom one) you'll need to configure Zend_Auth so it will clear the identity correctly.
If that fixes the problem, I suggest bootstrapping Zend_Auth so that it's ready to go in all of your actions. -- *Hector Virgen* http://www.virgentech.com Circle me on Google+ https://plus.google.com/101544567700763078999/
