Back buttons on webpages.

Don't do it. You know it's wrong.

My browser has a back button, so I don't need one on your webpage. Give me bread crumbs, help me see where in your site I am, but back buttons don't work.

Either they go to the page's referrer, or to the last page in the browser history (should be the same, but not always). How pointless is that? If I come to one of your pages from outside your site and the best you can do is send me back to where I came from, then frankly you're not trying hard enough.

So, pull your socks up and decide how you want me to navigate your site. Either that, or I'm going somewhere else.