I set up a bunch of users on my OS X Server 3 (Mavericks) requesting they reset the temporary password I gave them. However, no one is able to do that: when connecting via AFP for the first time, they enter their temporary password and are asked to change it, but the form does not accept any value. I don't know if it doesn't accept the current password or the new passwords but I suspect the first: any subsequent login doesn't accept the old password and refuses to even show the change password form.
GV jan 13th: We are having the same issue; Our admins do not seem to have this problem, the weird thing is only the other users have this issue.