At first glance, the difference between RECENT and NEWEST when browsing through a user's questions is unclear. If one scrolls over the label, then it reads
RECENT: sort by recent activity
NEWEST: sort by creation date
and a simple search will also reveal the difference. However, in the Questions tab, these two options are instead labeled
NEWEST: the most recently asked questions
ACTIVE: questions that have recent activity
I think this latter approach is much more clear, since both could be referred to as RECENT. Any chance of changing the profile sort options to match this? Or, any good reason why not to change it?