I was receiving occasional emails from cron telling me that while running run-crons, /var/spool/cron/lastrun/<whichever> didn't exist. I think that this was caused by a race between run-crons and the corresponding rm cron job. I have changed the minutes entry of the run-crons line in /etc/crontab from "*/15" to "1-59/15" to delay it by one minute. Since making the change - no more emails. Of course as this was an occasional problem this could be luck but it looks good to me. This isn't a big deal as the cronjobs do run, but unnecessary error emails irritate me :( FWIW I'm running vcron 3.0.1-r1.
*** This bug has been marked as a duplicate of 3966 ***
