I have been using wordpress for almost 3 years. I only go and read the install page or the read me file IF I am having problems. ALOT of times I come to this website and do searches most of the time first. That is what a number of new users do. That is why I made my post so people would see it if they searched for it.
IMO the best place to put a little note is on the settings page where you have the shortcodes. Just a little reminder to people to go to their permalinks page and just click save again.
This is a great plug in and I was just putting the tip out there. It also allows you to use other carts and they do not conflict. So I can have product that just has pricing, but you can not order and then you can have merchandise to sell at the same time.