<A href="http://www.bleedyellow.com/blogs/m.leusink/entry/the_order_of_events_in_xpages?lang=en" target="_blank">Mark Leusink saw a post asking what happens when a user presses the "back" button</A> in an XPage app. Mark built a small program to test it out. He's posted the code and an explanation of what happens.