After 10.8.2 and efi upgrade apple thunderbolt monitor is black

After the upgrade when I boot with the display connected (thunderbolt) both the macbook and external apple display remain black with the cursor in outline. When the display is disconnected the macbook screen returns. What about it apple this is a premium computer and screen and its all designed by you guys?

My display is working great - and I've been through the 10.82 update, the 10.8.2 update, etc., but no firmware update (your's was likely Retina-specific).
Your ATB should just be pug-and-play. Since you're still under warranty, I would contact AppleCare and possibly setup and appointment with the Genius Bar folks at your local Apple Store: something's not right - whether it's you display or your notebook.
Clinton

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