Ok. This is what I just did, using Internet Explorer 5 on Windows 98 on this forum.
I registered as: (username) newtest with (password) testnew. I filled in just the required fields. I then signed in, went to edit preferences where I filled in the occupation field and entered my password once, on submitting the form I got the message "Error in user data: Passwords didn't match!"
I then filled in the second password field, submitted the form and got the message, "Preferences updated, password changed, re-login on the main page".