Recently Facebook mentioned that one can able to access their Facebook account by 3 password types, I mean the same facebook password but with different letter cases, see below for more details.
Access Facebook account
Access Facebook account by using 3 different passwords
For Example your Facebook Password is “password123” then you can also able to login with :
3. and lastly the password which you set.
In technical terms:
Facebook actually accepts three forms of your password:
1. Your original password.
2. Your original password with the first letter capitalized. This is only for mobile devices, which sometimes capitalize the first character of a word.
3. Your original password with the case reversed, for those with a caps lock key on.
this is very useful because when you are accessing in a public network or any other place simply you can use CAPS and mingle those.