#8 people.findByUsername doesn't work on Flickr nor 23hq

[Anonymous]

This query:
http://www.23hq.com/services/rest/?api_key=apikey&method=people.findByUsername&username=username

Returns:
<?xml version="1.0" encoding="UTF-8"?>
<rsp stat="ok">
<user id="12345" nsid="12345">
<username>username</username>
</user>
</rsp>

But phpFlickr::people_findByUsername('username') doesn't return what's found?