I'd be interested to see what the various 10.6.2 machines represented in this thread produce for output, in response to this Terminal command:
pkgutil -v --file-info /System/Library/CoreServices/RemoteManagement/ARDAgent.app/Contents/MacOS/ARDAgent
Anyone? — That will list any incarnations of ARDAgent installed previously and currently in the OS (at least as far as Disk Utility will be able to discern), indicating which package it came from, as well as its SHA-1 digest value.
