I haven't seen this before - could be related to version 7.1.1, but I'm really not sure:
Running Indigo mac client on my laptop and connecting remotely, at the bottom of the Home Window, I see Z-Wave (in green) and "Insteon / X-10 Powerline Interface" shows in red with a line through it.
At the exact same time, running Indigo mac client on the same machine running Indigo server, both Z-Wave and "Powerlinc 2413U" appears in green.
Server and both clients are running 7.1.1 and self-report as running latest versions.
So this looks like I'm seeing some kind of bug. Whatever the problem is, it returns/persists when I stop server, restart, then reconnect the remote client.