Fixes a reftex bug with emacs 24.x (as per https://lists.gnu.org/archive/html/emacs-orgmode/2014-10/msg00762.html)

reftex-parse.el.patch

--- reftex-parse.old.el 2014-11-05 18:00:04.128132764 +0100
+++ reftex-parse.el     2014-11-05 17:54:52.834802367 +0100
@@ -357,7 +357,7 @@
       (member "biblatex" TeX-active-styles)
     ;; poor-man's check...
     (save-excursion
-      (re-search-forward "^[^%]*\\\\usepackage.*{biblatex}" nil t))))
+      (re-search-forward "^[^%\n]*\\\\usepackage.*{biblatex}" nil t))))

 (defun reftex-locate-bibliography-files (master-dir &optional files)
   "Scan buffer for bibliography macros and return file list."