Have you increased the display magnification (via the advanced display properties)? Depending on the magnification, more or less of the dialog controls may not fit in the window (funny, if you click on any control and use the Tab key, you can step through the invisible controls as well, but that's a guesswork, for you don't know which one has the focus).
I posted this error for at least a year ago, or much longer back. The answer was "we are working on it". A possible solution is changing to the "new" XP interface (like the rounded cornered dialog boxes, as opposed to the "Classic" interface).
What is your screen resolution?
Thank you both for jumping in. Truly much appreciated. In a related post right here I noted that the DNG is suddenly working again. I don't get it. My resolution (and I have tried many) is 1280x1024. I have not yet, but will, the different XP interface. Thank you again. Greg.