My apache2 logs didn't rotate overnight. They've been rotating flawlessly for months.

The process was set to run at 6:40am, and it didn't seem to go off. I waited an hour, just to see if it was daylight savings time related. Nope.

So, where are logs for that written?

I see a bunch is entries in /var/syslog from /USR/SBIN/CRON, but none have any logrotate entries.

Where else should I look for any errors?

(Ubuntu 10.04)