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- 09:29, 8 April 2016 ChrisHamburg talk contribs was automatically updated from rollbacker to rollbacker and extended confirmed user
- 23:28, 29 November 2008 DerHexer talk contribs changed group membership for ChrisHamburg from (none) to rollbacker (per request; well-known vandal fighter from de:wp who wants to help out here, too)