just found another problem when playing around with the plugin:
When using themed profile to edit user profile error messages for password UPDATE are not localized but come in English, taken from wp-admin\includes\user.php
The reason is that the validation is taken from user.php which usually looks up admin po/mo files, but since user profile is not in admin section any more but on frontend, WP does not recognize strings.
Include password update validation rules into plugin, just like password setting validation in custom-password.php. I am not sure where you would have to include them (maybe profile-form.php?)
Any suggestion for a temporary work-around would also be highly appreciated