paragraph-separate" is fixed, but raises a question about
tex-validate-region.
** tex-validate-region reports false errors on some LaTeX commands
http://lists.gnu.org/archive/html/bug-gnu-emacs/2007-09/msg00038.html
-** tex-terminate-paragraph ignores paragraph-start and paragraph-separate
+** tex-validate-region should probably a paragraph function, rather than "\n\n".
http://lists.gnu.org/archive/html/bug-gnu-emacs/2007-09/msg00040.html
** emacs-22.1 with GTK problems (with patches)