SaaS Best Practices: Password Rules to Boost Your Signup Rates

Some notes:

- Alphanumeric means letters and numbers, not at least a letter and a number. Your password form allows "&^%$&(^%$^&3a" for example. Alphanumeric would mean it only accepted characters in abcdefghijklmnopqrstuvwxyz0123456789. - Why does the form restrict me to 56 characters?