No the don't. But the controller has it's own issues: if 4 Cubes are connected then you cannot open the Advanced-page anymore, because it times out (after 50 seconds).
I don't know if you would find it useful, but some browsers like Firefox allow you to set the default timeout value. Changing this to a higher value would give the advanced page more time to load. Instructions on setting the network timeout for Firefox are here :
http://superuser.com/questions/303217/how-can-i-change-the-connection-timeout-setting-in-firefox