Last modified: 2012-04-16 09:16:03 UTC
http://en.wikipedia.org/w/api.php?format=xml&action=query&list=allusers&aulimit=3&aufrom=A produces the following result: <api> <query> <allusers> <u name="A" userid="5006869"/> <u name="A & D Phone Cards" userid="4364737"/> <u name="A & F" userid="13421528"/> <u name="A & F" userid="13421528"/> </allusers> </query> <query-continue> <allusers aufrom="A & K Reid"/> </query-continue> </api> The user A & F is listed twice when it should only be listed once.
looks like bug 26560
Indeed, looks like something has regressed. Will poke it later
And it's possibly
Duplicatebug you're right, it's a dupe of 26560 r79557 just wasn't backported to 1.17 to fix it. Will tag for it now *** This bug has been marked as a duplicate of bug 26560 ***