The tag displays the username of the publisher of tyhe fact.
You can use this tag only in html mode and at the very beginning of the html text you should type <advancedparser/>followed by the tag <loadmodule latestchanges/>.
Metainfo:
Author: factline Webservices GmbH; Published by: Ivo Marinov (factline3) factID: 1504554.1; published on 26 Aug. 2010 11:11