On Debian Wheezy one of the changes on packages is:
logrotate (3.8.0-1) experimental; urgency=low
Please note that this update changes the behaviour of logrotate:
Logrotate now skips directories which are world writable or writable
by group which is not “root” unless the (new) “su” directive is used.
— Paul Martin <firstname.lastname@example.org> Sun, 28 Aug 2011 19:16:36 +0100
This breaks and old hack that makes easy to rotate logs, need to read the changes on the documentation, it’s handy to have a dedicated program rotate your logs, and backups, that was I was using it on no root files.