@ Paul M - Ok, hmm, so, just because something's marked 'deprecated' it doesn't necessarily mean it's gone, just yet :erm: (Note to self)
Basically what we found with Database Marking was when you clicked on New Posts you got the same list you got from Whats New or Recent Activity rather than what used to come from New Posts. With Cookie Marking New Posts only shows any new posts that you haven't read. If there were no new posts it would show "No new posts" or something like that.