Index: release/scripts/startup/bl_operators/wm.py
===================================================================
--- release/scripts/startup/bl_operators/wm.py	(revision 51173)
+++ release/scripts/startup/bl_operators/wm.py	(working copy)
@@ -1668,7 +1668,7 @@
 class WM_OT_addon_install(Operator):
     "Install an addon"
     bl_idname = "wm.addon_install"
-    bl_label = "Install Addon..."
+    bl_label = "Install from file..."
 
     overwrite = BoolProperty(
             name="Overwrite",
Index: release/scripts/startup/bl_ui/space_userpref.py
===================================================================
--- release/scripts/startup/bl_ui/space_userpref.py	(revision 51173)
+++ release/scripts/startup/bl_ui/space_userpref.py	(working copy)
@@ -92,7 +92,7 @@
             layout.operator("wm.keyconfig_import")
             layout.operator("wm.keyconfig_export")
         elif userpref.active_section == 'ADDONS':
-            layout.operator("wm.addon_install")
+            layout.operator("wm.addon_install", icon="FILESEL")
             layout.menu("USERPREF_MT_addons_dev_guides")
         elif userpref.active_section == 'THEMES':
             layout.operator("ui.reset_default_theme")