FYI - I've solved the network problems with my cube. I put the cube and a computer running the proxy on their own network behind a Linksys router.

The cube had been restarting every so often when it lost its connection to the proxy PC. The temporary fix was to point the cube at two separate computers so that it could fail back and forth. This kept the cube up but it took a performance hit. I'm not able to change anything on the network or remove devices to see what the problem is so behind the router the cube is working as it should.

I suspect putting the cubes and proxy on their own network behind a consumer grade router/firewall might help with the phone/tablet problem people have been having as well.