This question is because of troubleshooting I've been doing on Why won't data entered into CiviCRM profile html snippet save? Loading a Profile makes otherwise malfunctioning embedded forms work, and I suspect something is happening on the server side to allow access/give permission to something.
So: how do I view what's happening with cookie data in CiviCRM on the server side? I've tried rgrep to search all files in the web directory for the cookie name, and have dumped the CiviCRM database and the Joomla database and searched for the cookie name. I can't think of anywhere else to look. Thanks for any pointers!