diff -up doxygen-1.8.11/src/util.cpp.than doxygen-1.8.11/src/util.cpp
--- doxygen-1.8.11/src/util.cpp.than 2016-03-06 11:13:21.831912181 +0100
+++ doxygen-1.8.11/src/util.cpp 2016-03-06 11:15:20.359280738 +0100
@@ -6732,6 +6732,9 @@ QCString latexEscapePDFString(const char
case '\\': t << "\\textbackslash{}"; break;
case '{': t << "\\{"; break;
case '}': t << "\\}"; break;
+ case '_': t << "\\_"; break;
+ case '%': t << "\\%"; break;
+ case '&': t << "\\&"; break;
default:
t << c;
break;