OK, its Friday, I had to catch your attention somehow .. :-)
I just logged into a client's Zimbra installation (8 Network Edition), and noticed that there were a load of zombie processes. Doing
ps aux | grep " Z "
Shows me that all the zombie processes are zmdailyreport, one for each day going backwards in time.

What's going on here? I can kill off the processes with pkill pretty easy, but it would be nice to get the reports. Are they particularly processor intensive?