The author refers to "Handle common user mistakes" - by displaying a message "your caps lock is on".
Personally I love the Facebook approach. Facebook just accepts passwords with caps lock inverted, so you never have the problem in the first place. No need to display a message to the user.
Personally I love the Facebook approach. Facebook just accepts passwords with caps lock inverted, so you never have the problem in the first place. No need to display a message to the user.
Link: http://www.zdnet.com/article/facebook-passwords-are-not-case...