After the update to Apple Remote Desktop Admin this past week, many of my devices and all my groups have vanished. When I launched the aplication after the update, it took a very ong time to start. Has anyone else seen this behavior?
Yes, this is known issue with the 3.6 update. Lists can be lost if Remote Desktop quits or is force quit while starting up before the main window is displayed. Startup is noticibly slow when you have more than about 150 clients in your "All Computers" list. An update is in the works. See TOR's post at https://discussions.apple.com/message/19047368#19047368