I always pay the full statement amount on my Discover, and have been using the website since forever. It always featured a button to "pay statement amount" or something like that along with "pay current balance," "pay minimum payment," and "other amount," which you could fill in. I would just click the "statement amount" button and set the payment date. Today, I wasn't paying much attention and didn't notice there were only three buttons: "current balance," "minimum payment," and the "other amount" box. I hit the "current balance" button before I noticed it didn't match my statement; it was about $500 less.
Discover has removed the "pay statement amount" button. Now you have to enter the statement balance in the "other" box. I called Discover about it, and the guy said "There's no statement amount button," like there was never one there. Well, there was.
This is not a huge deal, but if had gone through the payment process, I would've been short on my payment and owed finance charges next month. I just wanted to give other Discover users a heads up on this.