A few moments ago I was banned from UK Insta a minute or so after joining for "Undefined".
This wasn't a Nexgen-issued ban; the message appeared in the console, so I suspect it's automated.
Potentially related to my use of the latest D3Dv10 renderer.
See my related thread posted several days ago, here:
http://www.unrealkillers.com/showthr...-ACE-whitelist