Request for unknown status command 529.
just an FYI.
if you see this error in your console application messages it means, in our case anyway, that a newer version (than what you have installed on the machine receiving the console message) of Apple Remote Desktop is accessing your machine.
it was driving me batty until we figured it out.
internet searches were of little help. maybe having it here will help someone.
full message:
3/19/15 2:03:36 PM ARDAgent[124] Request for unknown status command 529.