Windows XP: rough around the edges doesn't really apply with Longhorn a mere 3-undefined years down the road, but it's an interesting read. I wonder if there is a similar article for MacOS? Maybe MacOS is so perfect that the nitpickers can't find anything wrong with it? Guess not. There are others all over of course, and since the original article is from 2001, some of the XP UI bugs have hopefully been fixed :)
Thanks to this page for the link. John's updated observations are also up.