cron executes entries twice

[John]

Hi All,

For quite some time now my system has been executing all entries in the 
crontab twice, instead of the expected once.  This happens most obviously 
for the periodic scripts, but also on some scripts that I added for 
nightly, weekly, or runs at reboot.  This started not long after a 
buildworld upgrade from one 4.x to another 4.x.  Which upgrade, I don't 
recall unfortunately.  The executions of the scripts appear to occur within 
minutes of each other, if not seconds.

I checked /var/cron/tabs/root, and all entries are in there only once.

Cron is also only running as a single process.

The system is running 4.8-RC.

Any thoughts of where to look and what to look for?

Thanks!
-John