What does Firefox put onto my computer in private browsing mode?

Forgive me if this has been asked a million times before
I love private browsing but for security I'd love to know exactly what I leave on my C: Drive when I exit a Private Browsing session?
- Is there any trace of visited sites
- Is there any trace of viewed images
- Is there any trace of passwords / email addresses / text entered
- Is there any trace of MSN / Yahoo messenger conversations (in web mode)
If I use Private Browsing in combination with CC Cleaner (or similar) am I correct in assuming only my ISP can track where I've been or can other users of the same computer do this?

If you visit web pages that use MS software or plugins (WMP, Silverlight) then those plugins use the IE Temporary Internet folder and Cookies and may very well leave tracks there. Other plugins that do not recognize Private Browsing mode may very well do that. Flash 10.1 does recognize that mode, but I don't know about other plugins.
https://wiki.mozilla.org/User:Mconnor/PrivateBrowsing
https://wiki.mozilla.org/Firefox3.1/PrivateBrowsing/FunctionalSpec
https://wiki.mozilla.org/Firefox3.1/PrivateBrowsing/SecurityReview

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    Details

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