I am developing an application using PHP and mySQL. I did all my testing on Firefox and had no problems. I passed the application to a colleague who used IE7. Occasionally and for no apparent reason the PHP session 'dies' between calls. The server has no session information and so after the session_start() on a page a new session is set up. I have googled and found some references to P3P requirements for IE6/IE7 but I'm not sure this is the problem and I have not applied any P3P changes.
Any ideas?
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