v2.5.1 is flaky in its search-as-you-type functionality, finding matches only in the username field, even though it flags matches in other fields if the username field match succeeds. For example, if I start typing sm the plguin finds a match for an author whose username/nicename/email is thesmith/Jean Smith/thesmith(@)here.com but does not match mcstevem/Steve McConnell/smcconnell(@)here.com. Likewise the initial string an matches chyman/Carol Hyman/chyman(@)here.com but fails to match abguy/Ann Brody Guy/annguy(@)here.com. Oddly, though, if I start with the text string guy it not only matches the username abguy but also underlines the matching text string in the nicename and email fields as well. This problem did not exist in earlier versions.