I'm personally for putting the tab on both pages. Nothing wrong with more tabs right?
The only oddity is, because you can get to the Users page from both sides, what tab bar should the page have (the orange bar at the top of the page)?
Should it depend on where you come from? That's difficult to do and confusing also. I think the Contribute tab bar makes more sense on that page. But then if you come from Answers you'd be having the bar change on you, which is confusing as well.
hmmmmmmm
