--- doc/doxygen_manual.tex.orig	2012-02-11 18:34:00.000000000 -0500
+++ doc/doxygen_manual.tex	2012-03-04 13:56:33.000000000 -0500
@@ -13,7 +13,7 @@
 % input used in their production; they are not affected by this license.
 
 \documentclass{book}
-\usepackage[a4paper,left=2.5cm,right=2.5cm,top=2.5cm,bottom=2.5cm]{geometry}
+\usepackage[left=2.5cm,right=2.5cm,top=2.5cm,bottom=2.5cm]{geometry}
 \usepackage{makeidx}
 \usepackage{natbib}
 \usepackage{graphicx}
@@ -28,8 +28,7 @@
 \usepackage{alltt}
 \usepackage{ifpdf}
 \ifpdf
-\usepackage[pdftex,
-            pagebackref=true,
+\usepackage[pagebackref=true,
             colorlinks=true,
             linkcolor=blue,
             unicode
