In the catalog, the Adobe Reader MUI package (and I'm guessing non-MUI) is using the command line parameter:
DISABLE_ARM_SERVICE=1
This is incorrect. The correct parameter to disable the ARM service is:
DISABLE_ARM_SERVICE_INSTALL=1
Perhaps it changed one day, but I've personally tested both and only the bottom one works with current installers. Just FYI.
We're going to run this through some tests quick and assuming everything comes back great we'll have this change in place hopefully in the next catalog release! Thank you!