Unknown action -Common error report when copying a module

Several of our staff have seen this error when copying a module the error below occurs.  If you go back to the previous action via the browser you discover that the module has copied!

Caroline

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No action responded to edit_title. Actions: add_guide, add_page, add_to_guide, add_to_page, add_to_tutorial, add_tutorial, authorize, authorize_admin, clean, clear_guide_sessions, clear_module_sessions, clear_page_sessions, clear_sessions, clear_student, clear_tab_sessions, clear_tutorial_sessions, clear_unit, copy, course_pages, create, create_and_add_resource, create_module_object, current_guide, current_module, current_page, current_student, current_tab, current_tutorial, current_unit, custom_page_data, edit_content, edit_tags, find_mod, globalize, index, local_customization, menu_new, module_types, new_mod, paginate_guides, paginate_list, paginate_mods, paginate_pages, preview, remove_from_user, remove_user_from_mod, send_notices, set_theme, share, share_update, spellchecker, student_authorize, subject_guides, tagged, tags, tutorials, update, and view