Annoying as shit. If I'm trying to log into something with an E-mail address (already a fail, but that's another topic) and password, and I click "forgot password," don't take me to a form where I have to re-enter the goddamned E-mail address I JUST ENTERED.
Or every customer service phone line where the automated system asks for your info (account# or phone#) and then the customer service rep asks again >:(