Sessions breaking
<p>A client of mine has installed a simple server configuration onto his office PC. It all works (PHP &amp; MySQL) but something is going on with sessions.</p>

<p>If I have login window as a separate popup (on any browser), the session keys generated in the window don't go to the opener - even if I send session id to it on the address bar.</p>

<p>The same login system works on every other server (including my default WAMP installation) but the client's one.</p>
