When activated, the eZ XML Export extension overrides the browse.tpl template (/design/admin/override/templates/content/browse.tpl). This prevents the pagination mechanism from being displayed, because the template does not implement the code that deals with pagination correctly.
1. Activate the eZ XML Export extension (eZ Publish 4.7 / eZ XML Export extension 1.5.0);
2. Try to add an object relation (both using an object relation attribute or at the object level);
3. Browse a folder with more than 50 objects, pagination is not displayed.