“For example, if your Facebook password is operati@nGeronimo!, you can convert the uppercase characters to lowercase (and vice-versa) and the toggled password string – OPERATI@NgERONIMO! – will also get you into Facebook.”
I understand why they did it, but that makes a hackers job easier. If you want to know if you password is secure, try this site that tells you roughly how it would take a hacker to crack your password. Or better yet, use LastPass and create unique passwords for every site and you will only have to remember one password ever again.