Index: /trunk/doc/manual/user_ChangeLogImpl.xml
===================================================================
--- /trunk/doc/manual/user_ChangeLogImpl.xml	(revision 80583)
+++ /trunk/doc/manual/user_ChangeLogImpl.xml	(revision 80584)
@@ -59,5 +59,8 @@
 
       <listitem>
-        <para>dummy</para>
+        <para>Input: Added support for horizontal scrolling in the PS/2 mouse
+          device using the IntelliMouse Explorer protocol. Note that this support
+          is automatically used by Linux guests but not by Windows guests.
+        </para>
       </listitem>