On 12/25/05, SCZenz sczenz@gmail.com wrote:
It seems to find no vandalism earlier than February 2004 in any of the very high visibility articles I checked. Was there a change in Wikipedia custom and/or rollback functionality at that time, or is something going wrong with your counter?
In any case, good work.
Well spotted. It looks as if the rollback text changed that month from "Reverted to last edit by..." to "Reverted edits by...to last version by." I've added that pattern to the recogniser. Now it goes back as far as April, 2003. I suspect that the administrator rollback originated about that time, because even on one of our most vandalized articles has no recognisable rollbacks before that date. The editing rate was only one-hundredth of its current level at that date.