This is more annoying than life threatening, and maybe I am missing something. Until recently we could open the New Document panel, which already have the pixel size of the image you had copied to the clipboard, and hit the enter key to OK it. That doesn't work now. Even though the Create button is blue, it is not active. You can hover over Create with the mouse to make it active, but you might as well left click to OK it if you have done that. You can hit the Tab key 20 times (yes, I actually counted). You only need to hit Shift Tab three times to work backwards to the Create button, but It's still quicker to use the mouse.
It's a small thing, but it's annoying. This is happening with beta and full release versions, and with today's micro-updates. If I am missing something, please tell me. If it is also annoying you, please add to this thread to let the Development Team know.