[CentOS] rsync via crontab spawns over 20 processes

Hi all,

I've been running rsync via cron for a while now and all is well.

However on one particular new 5.5 box, whenever its runs via crontab,  
the machine ends up with over 20 rsync processes and a load of ~14 and  
eventually the machine dies.

But when running manually, I see it spawn 3 processes with a load of  
1.5.

My rsync command is simply;

rsync --delete -avvH --progress source target

Any thoughts?

- aurf