Comment on Ask HN: Is there a good reason for disallowing some characters from a password?parentComments−CJefferson4yFacebook actually do try flipping the capitalisation of your password (in case you have caps-lock on), and the capitalisation of the first letter (to cover this exact case): https://security.stackexchange.com/questions/68013/facebook-...While this technically slightly lowers security (they are trying 4 passwords built from the one you typed in), I don't think that's significant, and I imagine it greatly improves user experience.
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Facebook actually do try flipping the capitalisation of your password (in case you have caps-lock on), and the capitalisation of the first letter (to cover this exact case): https://security.stackexchange.com/questions/68013/facebook-...
While this technically slightly lowers security (they are trying 4 passwords built from the one you typed in), I don't think that's significant, and I imagine it greatly improves user experience.