Another reason to use the Private Browsing mode

I'm sure there's a good reason (ahem, shopping? really?) to use the Private browsing mode in Firefox and IE (note: you're not completely private in these modes. Proxies and other man-in-the-middle snooping are still possible) ... but if you use a shared/public/library computer, it might be worth it to go "Private" while checking your mail or going on facebook. When you return from "Private", it forgets all of your logged in status while in Private mode, so it's less likely that the next someone can hit (back) and see you still logged in. Just don't start bookmarking while in private mode...