I'm positive that the dialogue window isn't supposed to look like http://img.photobucket.com/albums/v510/mattkaine/Skyrim/DialogueWindowBug.jpg.

This is the first time I've worked with the new creation kit, so my apologies if this has been answered a thousand times already. However, I'm unable to start working on custom dialogue until I actually view the window properly. Does anybody have any idea why this might be happening and how to fix it? The object windows and everything else I've opened seemed to display just fine. Thanks for any help I receive.

That's been a known issue ever since the first beta. A (CK) restart used to clear it up for me.