There's an option to change your password in the /account info\ tab under "My Account".

However, the "Old Password :" field only accepts 17 characters, although passwords can be longer (my password is definitely longer than 17 characters - if I try to login using just the first 17, 18, etc characters of my password it fails. I need to enter my FULL password).

Therefore if I try to change my password I get the "Password entered does not match our record"  message, and

This needs to be fixed.

It would also be nice (and this is a problem on just about every site where you have to create a password) to have a statement like "your password must be between 6 and 17 characters long, and can include numbers, uppercase letters and lowercase letters but not punctuation symbols" (or whatever the actual restrictions are)