On Tue, Sep 4, 2012 at 5:03 PM, Brion Vibber brion@pobox.com wrote:
If you go back far enough you may find user accounts created under versions of MediaWiki that didn't record the account creation date; this is probably what you're seeing.
There has to be more to it than that. The creation date for User:Brion VIBBER, for instance, is displayed, even though the date for accounts created much later isn't.
On Tue, Sep 4, 2012 at 5:03 PM, Brion Vibber brion@pobox.com wrote:
Hmmmm, not sure if there's a reliable one. You can check if user_touched has been updated BUT this gets updated for things like people leaving messages on their talk page.
It gets reset for a user if other people edit that user's talk page? That kind of seems like a bug. :-)