I have version 6 running on a Windows 7 machine, Can't remember if i had any problems or not.
Only using it as a client though, im not connecting to any servers.
Thank you Martin. That certainly helps knowing that the clients will at least install and run.
This installation runs off a server at one military base with clients at two bases with about
20-30 clients. I don't believe they are changing the server OS which is now Windows Server 8
and things work well with that.