Thanks for being so polite! I bet you and the other guy are two of those people who say big things on the internets but in face-face contact are shy like a kitten. Aka trolls personified.
Anyway, why the hell do you think I would come here to make this stuff up? I have probably spent a factor of several more money on Apple products than you so have no reason to bash them just for the heck of it. The TB display and other displays aren't working with my RMBP. It might be a machine defect or a software issue having to do with my specific settings, yet you're claiming I'm somehow making s*** up? Go find a life, looser.
Back to topic, I imagine that the issue with the TB display was a hiccup, but am pretty sure at this point that the issue with the HP 30"er is something more serious, as I have re-tested the connection with two other laptops since yesterday. If anybody could be so kind to test a RMBP with Apple's MDP-DualDVI adapter and report back, I'd greatly appreciate it! Thanks to all of you who are being patient with me and are making constructive suggestions, instead of just online bashing me!