Debian package (http://repo.zabbix.com/zabbix/2.0/debian/pool/main/z/zabbix/zabbix-agent_2.0.14-1+wheezy_amd64.deb) has not complete logrotate configuration template.

viskup@debian:~$ cat /tmp/etc/logrotate.d/zabbix-agent
/var/log/zabbix/zabbix_agentd.log

{ daily rotate 7 compress missingok notifempty create 0640 zabbix zabbix sharedscripts }

The postrotate script is missing there. Didn't checked other packages. Now we don't have logs from zabbix agent after update.