I'm having the same issue.
Upgraded my mahcine to 10.9 and Remote Desktop 3.7 and now i have all sorts of issues.
Machines in Network Scanners are showing up with out of range IP's, Meaning if i set a scanner for a range of 172.18.96.1-254, Some machines in the 172.18.101.xxx range show up.
Machines flicker between IP's and online/offline
When connecting to a machine, it's often different from the one I selected.
Machines that are right next to me are not showing up in ARD, when everything is set exactly the same as anyone else. All my mahcines use a "build" from DeployStudio, and it's worked great for years. no muss, no fuss...
If I create a Scanner to add in a specific IP, I can watch it display properly for about 2 seconds, then just change to a different user's machine and IP address for no reason..
I have tried:
Deleting the .plist file
Deleting all my Scanners, and then clearing out of the machiens in "All Computers" and re-creating the Scanners.
Local Firewalls are OFF on all my machines.
There is no Proxy Server.
It's an Active Directory Environment.
It's worked perfect for the last 5 years or so.
I'd try trashing the whole thing, but I have a bunch of Command Templates and Installers I would hate to lose, but if that's the only way, then so be it..
If someone can confirm that that's the only way to fix it.