I admit that every new tab I've tried appears to actually open it in new instance of PIE, as you said, but I don't know what you mean by opening a link in a new "back tab". The only options I've seen are "New Blank", "New Current", "New from Closed", or "Current from Closed", and I've tried all of them with no luck. I've never seen anything but one tab on the bottom. Please help me out, because tabbing sure would be nice.