diff -Naur linphone-1.7.0-orig/gtk/interface.c linphone-1.7.0-uri_handler/gtk/interface.c
--- linphone-1.7.0-orig/gtk/interface.c	2007-04-15 22:41:22.000000000 +0200
+++ linphone-1.7.0-uri_handler/gtk/interface.c	2007-04-16 18:01:31.000000000 +0200
@@ -18,6 +18,7 @@
 #include "callbacks.h"
 #include "interface.h"
 #include "support.h"
+#include "uri_handler.h"
 
 #define GLADE_HOOKUP_OBJECT(component,widget,name) \
   g_object_set_data_full (G_OBJECT (component), name, \
@@ -824,6 +825,24 @@
   return app1;
 }
 
+/** Called when URL in About dialog is invoked */
+static void
+url_about_handler (GtkAboutDialog *about, const gchar *link, gpointer data)
+{
+  uri_handler(link);
+}
+
+
+/** Called when e-mail link in About dialog is invoked */
+static void
+email_about_handler (GtkAboutDialog *about, const gchar *link, gpointer data)
+{
+  gchar mailto_uri[MAX_URI_LENGTH];
+  snprintf(mailto_uri, MAX_URI_LENGTH, "mailto:%s", link);
+  uri_handler(mailto_uri);
+}
+
+
 GtkWidget*
 create_about2 (void)
 {
@@ -842,6 +861,9 @@
   gchar *translators = "it: Alberto Zanoni\nde: Jean Jacques Sarton\nfr: Simon Morlat\nes: Jesus Benitez\nja: Yamaguchi Yoshiya\npl: obert Nasiadek <address@hidden>\npt_BR: Rafael Caesar Lenzi <address@hidden>\nsv: Daniel Nylander <address@hidden>";
   GdkPixbuf *about2_logo_pixbuf;
 
+  gtk_about_dialog_set_url_hook (url_about_handler, NULL, NULL);
+  gtk_about_dialog_set_email_hook (email_about_handler, NULL, NULL);
+
   about2 = gtk_about_dialog_new ();
   gtk_container_set_border_width (GTK_CONTAINER (about2), 5);
   gtk_window_set_destroy_with_parent (GTK_WINDOW (about2), TRUE);
diff -Naur linphone-1.7.0-orig/gtk/Makefile.am linphone-1.7.0-uri_handler/gtk/Makefile.am
--- linphone-1.7.0-orig/gtk/Makefile.am	2007-04-15 22:41:22.000000000 +0200
+++ linphone-1.7.0-uri_handler/gtk/Makefile.am	2007-04-16 17:58:58.000000000 +0200
@@ -9,7 +9,9 @@
 	presence.c presence.h \
 	propertybox.c propertybox.h \
 	addressbook.c addressbook.h \
-	friends.c friends.h
+	friends.c friends.h \
+	uri_handler.c uri_handler.h 
+
 
 
 if BUILD_GTK
diff -Naur linphone-1.7.0-orig/gtk/uri_handler.c linphone-1.7.0-uri_handler/gtk/uri_handler.c
--- linphone-1.7.0-orig/gtk/uri_handler.c	1970-01-01 01:00:00.000000000 +0100
+++ linphone-1.7.0-uri_handler/gtk/uri_handler.c	2007-04-16 18:04:29.000000000 +0200
@@ -0,0 +1,16 @@
+#include <sys/types.h>
+#include <unistd.h>
+
+/**
+ * Handle any URI using external application.
+ * TODO: make handler configurable ("url_handler.sh" from mutt/urlview now)
+ * @param uri The handled URI. E.g. "mailto:address@hidden"
+ */
+void uri_handler(const char *uri) {
+  const char handler[]="url_handler.sh";
+  if (uri) {
+    if (!fork()) {
+      execlp(handler, handler, uri, NULL);
+    }
+  }
+}
diff -Naur linphone-1.7.0-orig/gtk/uri_handler.h linphone-1.7.0-uri_handler/gtk/uri_handler.h
--- linphone-1.7.0-orig/gtk/uri_handler.h	1970-01-01 01:00:00.000000000 +0100
+++ linphone-1.7.0-uri_handler/gtk/uri_handler.h	2007-04-16 18:04:29.000000000 +0200
@@ -0,0 +1,15 @@
+#ifndef __URI_HANDLER
+#define __URI_HANDLER
+
+/**
+ * Handle any URI using external application.
+ * TODO: make handler configurable (now "url_handler.sh")
+ * @param uri The handled URI. E.g. "mailto:address@hidden"
+ */
+void uri_handler(const char *uri);
+
+/* Maximal length of URI string. Adjust it if you preffer another value.
+ * TODO: Has been something similar already defined here in Linphone? */
+#define MAX_URI_LENGTH 4096
+
+#endif