missing interpolation argument in "%a, %{count} %b %Y %H:%M:%S %z" ({:object=>Mon, 13 Sep 2010 21:09:21 UTC +00:00} given)
This happend with rails 2.3.5 and the gem i18n 0.4.1
gem uninstall -v 0.4.1 i18n
solved the problem.
Also see this link for more info: http://groups.google.com/group/activescaffold/browse_thread/thread/ad73fbf2fc675dd6/efb52a91ba81cb4d
