diff -Naur pan-0.125.old/pan/gui/prefs-ui.cc pan-0.125.new/pan/gui/prefs-ui.cc
--- pan-0.125.old/pan/gui/prefs-ui.cc	2007-02-01 16:43:26.000000000 +0100
+++ pan-0.125.new/pan/gui/prefs-ui.cc	2007-04-03 23:47:54.000000000 +0200
@@ -157,10 +157,8 @@
     // build the combo box...
     const std::string mode (prefs.get_string (mode_key, mode_fallback));
     GtkListStore * store = gtk_list_store_new (2, G_TYPE_STRING, G_TYPE_STRING);
-    const char* strings[5][2] = { { N_("Use GNOME Preferences"), "gnome" },
+    const char* strings[3][2] = { { N_("Use GNOME Preferences"), "gnome" },
                                   { N_("Use KDE Preferences"), "kde" },
-                                  { N_("Use OS X Preferences"), "mac" },
-                                  { N_("Use Windows Preferences"), "windows" },
                                   { N_("Custom Command:"), "custom" } };
     int sel_index (0);
     for (size_t i=0; i<G_N_ELEMENTS(strings); ++i) {
diff -Naur pan-0.125.old/pan/gui/url.cc pan-0.125.new/pan/gui/url.cc
--- pan-0.125.old/pan/gui/url.cc	2007-02-01 16:43:26.000000000 +0100
+++ pan-0.125.new/pan/gui/url.cc	2007-04-03 23:47:31.000000000 +0200
@@ -29,21 +29,15 @@
 
 using namespace pan;
 
-// possible values: "gnome", "kde", "mac", "windows", "custom"
+// possible values: "gnome", "kde", "custom"
 const char*
 URL :: get_environment ()
 {
   const char * mode ("custom");
-#if defined(G_OS_WIN32)
-  mode = "windows";
-#elif defined(G_OS_DARWIN)
-  mode = "mac";
-#else // not mac or windows
   if (g_getenv ("GNOME_DESKTOP_SESSION_ID"))
     mode = "gnome";
   else if (g_getenv ("KDE_FULL_SESSION"))
     mode = "kde";
-#endif
   return mode;
 }