Alexandr Kozyrev wrote a patch for option to turn off all logging for acpid here:
Would you consider including it upstream? We'd rather not start carrying this custom patch in distro-level.
The latest version of acpid includes the "-l" option which turns on event logging. By default, in the later versions, event logging is off. Sounds like you guys have an older version of acpid. I recommend upgrading either to the latest that is here, or upgrading to the latest 2.0.x version which can be found here:
Thanks for your quick reply! I actually added 2.0.3 to our packaging system today, hence this bug, going thru our old bugs.