After a user receives the account confirmation by email and then he clicks the connection link, when he save is password, an error message appears, but it appears also when the user saves his account:
Notice : Undefined index: priority dans xmlsitemap_process_form_link_options() (line 1343 /sites/all/modules/xmlsitemap/xmlsitemap.module).
In configuration I have removed users from the xmlsitemap, so I don't understand this error message.