Hi,
in 6.3.1, when viewing list subscribers (Lists -> (list name) -> Subscribers), the list of subscribers on the right-hand side of the screen does not show all subscribers, but only a small subset. If I enter anything in the search box (for example "@", or anything else and then remove it), the results refresh to show the complete list. Not a big problem, but seems like a small bug that you might want to look into.
Thanks