An owner of one of our lists tried to PUT it. The only errors I could find in the console were From (own): PUT listname LIST PW=listpassword To (own): The following problems have been detected in the list header: (...) To (own): PUT operation rejected, old list remains unchanged. The error wasn't specified - only the ellipses (...) was there. Only difference I could see was that MAIL-VIA was changed from DIST2 to DIST and several owners were changed.