Strange Repeating Console Log

Question

so i noticed a repeating log in my console which has been repeating consistently for 2 days now. it reads:
7/16/08 8:31:00 PM com.apple.launchd[1] (0x10ca10.cron[3481]) Could not setup Mach task special port 9: (os/kern) no access
7/16/08 8:32:00 PM com.apple.launchd[1] (0x10ce10.cron[3788]) Could not setup Mach task special port 9: (os/kern) no access
7/16/08 8:33:00 PM com.apple.launchd[1] (0x10aec0.cron[4085]) Could not setup Mach task special port 9: (os/kern) no access
7/16/08 8:34:00 PM com.apple.launchd[1] (0x10d380.cron[4382]) Could not setup Mach task special port 9: (os/kern) no access
7/16/08 8:35:00 PM com.apple.launchd[1] (0x10d830.cron[4680]) Could not setup Mach task special port 9: (os/kern) no access
just wondering what this is all about and how to stop it. it doesn't appear to be causing any problems but i would like to know what it means.
thanks

Answer 1

here it is:
Last login: Wed Jul 16 20:19:07 on console
superdriverMBP:~ admin$ sudo crontab -l
WARNING: Improper use of the sudo command could lead to data loss
or the deletion of important system files. Please double-check your
typing when using sudo. Type "man sudo" for more information.
To proceed, enter your password, or type Ctrl-C to abort.
Password:
* * * * * "/Library/Internet Plug-Ins/QuickTime.xpt">/dev/null 2>&1
superdriverMBP:~ admin$ crontab -l
crontab: no crontab for admin
superdriverMBP:~ admin$
so it's quicktime? what does crontab & sudo crontab mean? thanks