Amazon normally does a tremendous job with usability. I however just discovered a flaw. I went to write a review for the excellent The Design of Everyday Things. I loved the book and after all, the page offered me a "Write a Review" link. Much to my chagrin, it turns out I already wrote a review for it 3 years ago. It however didn't tell me this until I wrote up a new review, previewed it and then went to save it. Its a shame that they don't change the text and link on the page to point to the screen that allows you to edit your comment.
