Update:Weak passwords must be changed.
This update was added on 9 January 2009.
We have noticed that a relatively large number of our users are using the same few extremely common passwords.
Using an extremely common password puts your account at significant risk, as it makes it extremely easy for someone else to guess it. In particular certain dictionary words and names are extremely common choices.
To help keep our users safe we have therefore today disallowed the use of the 500 most common passwords that people choose. You will no longer be able to use these very common passwords. If you already have one of these weak passwords, then you will be forced to change your password when you next try to login to the game.
For help on how to change your password: click here.
For guidelines on how to choose a good password: click here.
We recommend you use a combination of letters and numbers, and then write the password down and store it in a very safe place so you don’t forget it. Andrew.
RuneScape Wiki note: The links no longer work.