In bug 588156 you changed the installation path of logrotate from /usr/sbin to /usr/bin however you didn't update the cronjob resulting in > /etc/cron.daily/logrotate: line 3: /usr/sbin/logrotate: No such file or directory errors...
This should already fixed in https://bugs.gentoo.org/show_bug.cgi?id=589854
*** This bug has been marked as a duplicate of bug 589854 ***