Dear list I believe I have found a bug in the export of latex source blocks (to HTML, ascii, etc) when ob-latex.el has been loaded. In summary, setting the :exports argument as a header property fails to override the default value in org-babel-default-header-args:latex Please see the attached org file for a demonstration. Cheers Will --   Dr William Henney, Centro de Radioastronomía y Astrofísica,   Universidad Nacional Autónoma de México, Campus Morelia