Index: xfce4-terminal-0.4.8/terminal/terminal-preferences.c
===================================================================
--- xfce4-terminal-0.4.8.orig/terminal/terminal-preferences.c	2011-06-21 22:32:31.000000000 +0200
+++ xfce4-terminal-0.4.8/terminal/terminal-preferences.c	2012-03-02 20:49:23.106757883 +0100
@@ -121,6 +121,7 @@
   PROP_MISC_TAB_CLOSE_MIDDLE_CLICK,
   PROP_MISC_TAB_POSITION,
   PROP_MISC_HIGHLIGHT_URLS,
+  PROP_MISC_SCROLL_ALTERNATE_SCREEN,
   PROP_SCROLLING_BAR,
   PROP_SCROLLING_LINES,
   PROP_SCROLLING_ON_OUTPUT,
@@ -1240,6 +1241,19 @@
                                                          EXO_PARAM_READWRITE));
 
   /**
+   * TerminalPreferences:misc-scroll-alternate-screen:
+   *
+   * Whether to scroll the alternate screen with the mouse wheel
+   **/
+  g_object_class_install_property (gobject_class,
+                                   PROP_MISC_SCROLL_ALTERNATE_SCREEN,
+                                   g_param_spec_boolean("misc-scroll-alternate-screen",
+                                                        "misc-scroll-alternate-screen",
+                                                        "MiscScrollAlternateScreen",
+                                                        TRUE,
+                                                        EXO_PARAM_READWRITE));
+
+  /**
    * TerminalPreferences:shortcuts-no-menukey:
    *
    * Disable menu shortcut key (F10 by default).
Index: xfce4-terminal-0.4.8/terminal/terminal-screen.c
===================================================================
--- xfce4-terminal-0.4.8.orig/terminal/terminal-screen.c	2011-06-21 22:32:31.000000000 +0200
+++ xfce4-terminal-0.4.8/terminal/terminal-screen.c	2012-03-02 20:36:54.820165118 +0100
@@ -99,6 +99,7 @@
 static void       terminal_screen_update_misc_cursor_blinks     (TerminalScreen        *screen);
 static void       terminal_screen_update_misc_cursor_shape      (TerminalScreen        *screen);
 static void       terminal_screen_update_misc_mouse_autohide    (TerminalScreen        *screen);
+static void       terminal_screen_update_scrolling_alternate    (TerminalScreen        *screen);
 static void       terminal_screen_update_scrolling_bar          (TerminalScreen        *screen);
 static void       terminal_screen_update_scrolling_lines        (TerminalScreen        *screen);
 static void       terminal_screen_update_scrolling_on_output    (TerminalScreen        *screen);
@@ -291,6 +292,7 @@
                     "swapped-signal::notify::misc-cursor-blinks", G_CALLBACK (terminal_screen_update_misc_cursor_blinks), screen,
                     "swapped-signal::notify::misc-cursor-shape", G_CALLBACK (terminal_screen_update_misc_cursor_shape), screen,
                     "swapped-signal::notify::misc-mouse-autohide", G_CALLBACK (terminal_screen_update_misc_mouse_autohide), screen,
+                    "swapped-signal::notify::misc-scroll-alternate-screen", G_CALLBACK (terminal_screen_update_scrolling_alternate), screen,
                     "swapped-signal::notify::scrolling-bar", G_CALLBACK (terminal_screen_update_scrolling_bar), screen,
                     "swapped-signal::notify::scrolling-lines", G_CALLBACK (terminal_screen_update_scrolling_lines), screen,
                     "swapped-signal::notify::scrolling-on-output", G_CALLBACK (terminal_screen_update_scrolling_on_output), screen,
@@ -309,6 +311,7 @@
   terminal_screen_update_misc_cursor_blinks (screen);
   terminal_screen_update_misc_cursor_shape (screen);
   terminal_screen_update_misc_mouse_autohide (screen);
+  terminal_screen_update_scrolling_alternate (screen);
   terminal_screen_update_scrolling_bar (screen);
   terminal_screen_update_scrolling_lines (screen);
   terminal_screen_update_scrolling_on_output (screen);
@@ -948,6 +951,16 @@
 }
 
 
+
+static void
+terminal_screen_update_scrolling_alternate (TerminalScreen *screen)
+{
+  gboolean scroll;
+  g_object_get (G_OBJECT (screen->preferences), "misc-scroll-alternate-screen", &scroll, NULL);
+  vte_terminal_set_alternate_screen_scroll (VTE_TERMINAL (screen->terminal), scroll);
+}
+
+
 
 static void
 terminal_screen_update_scrolling_bar (TerminalScreen *screen)