diff -up asymptote-1.80/settings.cc.BAD asymptote-1.80/settings.cc
--- asymptote-1.80/settings.cc.BAD	2009-07-10 17:27:43.824929320 -0400
+++ asymptote-1.80/settings.cc	2009-07-10 17:28:18.505949915 -0400
@@ -81,11 +81,11 @@ const bool haveglut=false;
 bool msdos=false;
 string HOME="HOME";
 const char pathSeparator=':';
-string defaultPSViewer="gv";
+string defaultPSViewer="evince";
 #ifdef __APPLE__
 string defaultPDFViewer="open";
 #else  
-string defaultPDFViewer="acroread";
+string defaultPDFViewer="evince";
 #endif  
 string defaultGhostscript="gs";
 string defaultPython;