tsk.
Anyway, it'll say it's new if it's been changed recently, though it seems unreliable in noticing that, and it'll say something is new if something has been added since you last logged on. Thing is, if you use multiple computers, it gets muddled, so it'll take you to the first page, rather than the new one. Also, if whatever was posted gets deleted, it'll still tag it as new, since it's been changed.
It's not exactly smart, but it works alright, I think.