There are several issues with the form navigator:
1.1. Go to my account --> Password
1.2 Type your current password, and then 2 passwords that don't match. After typing, you should see a red exclamation mark icon besides the password link in the right menu (it only happens randomnly right now)
2. Server side errors
2.1. Go to my account --> Password
2.2 Type WRONG your password and then 2 passwords that match. After SAVING, you should see the red exclamation mark icon besides the password link in the right menu AND "password" should be the section displayed (not details).
In Addition, hovering the exclamation mark should say something as "this section contains errors".