[t_hah]

It seems that the "periodic" maintenance and cleaning scripts have been moved in Tiger. If you look at the "/etc/crontab" file, you will see this in there

Code:
# The periodic and atrun jobs have moved to launchd jobs
# See /System/Library/LaunchDaemons
#
# minute        hour    mday    month   wday    who     command

Does anyone know more about this?

[Ganesha]

http://forums.macnn.com/90/mac-os-x/254060/howto-change-time-periodic-tasks-run/

[Thorin]

There's some information about launchd in the Ars Technica Tiger Review. Don't think it answers your specific question, but might lead you in the right direction.

[t_hah]

Ganesha and Thorin: thanks for the links!