We've been receiving quite a number of emails from users that received an email notification like this:

Someone has tried to log into your account on The Realm of Mortal Kombat Forums with an incorrect password at least 5 times. This person has been prevented from attempting to login to your account for the next 15 minutes.
This is a new pattern of spam intrusion into our forum software. In order to combat this, we are turning on a captcha system for login attempts after 3 failed attempts. Hopefully this will prevent the spam bots from getting to the 5th lock out attempt and in turn, not send the email notification.

Please let us know if you see any problems with this new setting.