If you go to "advanced search" and enter "sadfasdfa" (or any non-existant username) in the "Username" box at the bottom, the page you get back says:
Find User: Users that matched: asdfasdfa: 1
No users were found matching the author your entered.
I'm guessing that "1" should be a "0".
Find User: Users that matched: asdfasdfa: 1
No users were found matching the author your entered.
I'm guessing that "1" should be a "0".