Weird Iworx chron errors in email

Can anyone tell me what’s up with these chron errors? I’ve not yet figured out chron, so I’m not too sure where to start with this one.

Date:*17 Oct 2004 02:00:07 -0000
From: Cron Daemon <root@server1.tompkins.com>
To:*root@server1.tompkins.com
Subject:*Cron <iworx@server1> cd /home/interworx/cron ; ./iworx.pex --fively

ERROR: start (1097978408) should be less than end (1097978407)
ERROR: start (1097978408) should be less than end (1097978407)
ERROR: start (1097978408) should be less than end (1097978407)
ERROR: start (1097978408) should be less than end (1097978407)
ERROR: start (1097978408) should be less than end (1097978407)
ERROR: start (1097978408) should be less than end (1097978407)
ERROR: start (1097978408) should be less than end (1097978407)
ERROR: start (1097978408) should be less than end (1097978407)
ERROR: start (1097978408) should be less than end (1097978407)
ERROR: start (1097978408) should be less than end (1097978407)

You can safely ignore these errors, they aren’t actually hurting anything. They’re a result of the server clock time being sync’d automatically when the clock drifts too far off “real time”, and the SiteWorx real time statistics graphs being updated. These messages should happen very rarely.