Imagine you have a Zend Framework (version 1) application on a domain example.org, and another on a domain admin.example.org. They both have authentication mechanisms using Zend_Auth. This authentication information is stored in a browser cookie. Now I came across this problem that being logged in on both systems does not pose any problems with Google Chrome or Mozilla Firefox, but for some very strange reason, Microsoft Internet Explorer didn’t like it. The admin.example.org domain would be broken if you were logged in on example.org first. The server spewed out a 500 Internal Error, so I checked in the server logs to see what the heck was happening.
Continue reading Cookies and Internet Explorer →