Hi Ryan,
I could access the console from windows platform before I tried IcedTea Java (Ubuntu) and everything worked fine. When I accessed console via IcedTead Java for the first time I've encountered this issue. Then I switched back to the windows platform client but the problem remained. Answering to your question - I can access the Netsight from Windows, but I cannot poll the devices in any way, except when using topology manager. Topology Manager works fine.
Regards,
Merdan