2010/12/14 Raymond Yee <raymond.yee(a)gmail.com>om>:
What happened with User:Katr67 seems to be a bit
different. We can find a
renaming event for User:Katr67
http://en.wikipedia.org/w/index.php?title=Special:Log&type=renameuser&a…
shows
03:31, 18 September 2010 Nihonjoe (talk | contribs) renamed User:Katr67 to
"Valfontis" (53,420 edits. Reason: WP:CHU)
However, the User:Katr67 account is not deleted (as was
User:Penrithpanthers). Instead, going to
http://en.wikipedia.org/wiki/User:Katr67 redirects to
http://en.wikipedia.org/wiki/User:Valfontis And we look up both users at
http://en.wikipedia.org/w/api.php?action=query&list=users&ususers=K…
we get
This happens sometimes, usually due to the user being logged in while
they're being renamed or something, causing the old name to be
recreated. That doesn't seem to be the case here (timestamp mismatch)
so I'm not sure exactly what happened in this particular case; maybe
someone just recreated the account, simple as that.
This is probably from the user rename bug where edits from users with
large edit counts don't get re-attributed properly in the revision table.