Hi,
When I disable the CB Core Fields Ajax plugin it's working again. Only it says 'error' but it saves the profile.
We got people who said that after changing their password in the with-cb-ajax-enabled field, they can't login anymore with their new password, either with their old password.
I tested it with my 'registered' test user and I can confirm the problem. So I disabled the feature. But it is a nice one. Is it related to the other CB-ajax-firstname and last name question I put on the forum earlier?