I'm moving through the files in Category:NowCommons at german wikipedia in the order of categorization.
to get an overview over the oldest files: http://de.wikipedia.org/w/api.php?action=query&list=categorymembers&cmtitle=Category:NowCommons&cmsort=timestamp&cmdir=asc&cmlimit=10&cmprop=title&cmnamespace=6
the first file is obtained by http://de.wikipedia.org/w/api.php?action=query&list=categorymembers&cmtitle=Category:NowCommons&cmsort=timestamp&cmdir=asc&cmlimit=1&cmprop=title&cmnamespace=6, it is "Postmeilensaeule Zwoenitz.jpg". the cmcontinue token is "PMSOberwiesenthal 2.jpg|". therefore, http://de.wikipedia.org/w/api.php?action=query&list=categorymembers&cmtitle=Category:NowCommons&cmsort=timestamp&cmdir=asc&cmlimit=1&cmprop=title&cmnamespace=6&cmcontinue=PMSOberwiesenthal 2.jpg| should give the next file. Yet, it is the same result as the first query without cmcontinue.
Version: 1.13.x
Severity: normal
URL: http://de.wikipedia.org/w/api.php?action=query&list=categorymembers&cmtitle=Category:NowCommons&cmsort=timestamp&cmdir=asc&cmlimit=1&cmprop=title&cmnamespace=6&cmcontinue=PMSOberwiesenthal%202.jpg|