I bet you a pint that the design process was basically "well, we put in EVERYTHING that came from EVERY SINGLE focus group we had, so it's digital sex on a screen! It has to be, right? Look, we're user oriented!"
And behold, it's Winders Vista. With seethrough bits that aren't, and navigable bits that don't, and side panes you close by hiding them under another one, and I still can't find how you alter the UI font.