Directory names have different (more recent) name than Last modified timestamp.
This difference incereases during the time.
Example (cswiktionary):
20100311/ 2010-Mar-11 02:44:48 - Directory
20100318/ 2010-Mar-18 15:52:52 - Directory
20100326/ 2010-Mar-26 17:41:09 - Directory
20100402/ 2010-Apr-02 01:39:23 - Directory
20100505/ 2010-May-06 00:00:45 - Directory
20100530/ 2010-May-30 06:09:09 - Directory
20100612/ 2010-Jun-12 09:48:40 - Directory
20100622/ 2010-Jun-22 00:55:28 - Directory
20100727/ 2010-Jul-27 23:56:35 - Directory
20100807/ 2010-Aug-07 20:19:34 - Directory
20100815/ 2010-Aug-14 19:45:51 - Directory
20100825/ 2010-Aug-24 20:35:01 - Directory
20100903/ 2010-Sep-01 22:21:51 - Directory
20100914/ 2010-Sep-11 15:49:16 - Directory
See the August and further dumps.
Version: unspecified
Severity: minor