So something recently happened to me. While loggin in, what is a procedure of
Click Login -> Type Letter "g" -> Arrow Down to select GregoriusT in the Dropdown Box -> Enter -> Tab -> Enter Password -> Enter
The Dropdown Box lagged a little and it tried to log me in as "g" after pressing Enter the first time. Not so bad, I just try again, but then the Forum told me to take a Captcha. Also not bad, security gets a +1. The security is so good, that there is neither a Captcha nor anything where I could type the answer to the nonexisting Captcha. I then suspected AdBlock to be the problem, but nope, it didn't block anything.
For details, see Screenshot below: