diff --git a/glade/prefs.glade b/glade/prefs.glade
index 71b9274..06dd951 100644
--- a/glade/prefs.glade
+++ b/glade/prefs.glade
@@ -85,10 +85,9 @@
 		  <property name="visible">True</property>
 		  <property name="can_focus">True</property>
 		  <property name="headers_visible">False</property>
-		  <property name="rules_hint">False</property>
+		  <property name="rules_hint">True</property>
 		  <property name="reorderable">False</property>
 		  <property name="enable_search">True</property>
-		  <signal name="row_activated" handler="on_category_tree_row_activated" last_modification_time="Thu, 30 Nov 2006 19:51:42 GMT"/>
 		  <signal name="cursor_changed" handler="on_category_tree_cursor_changed" last_modification_time="Thu, 30 Nov 2006 19:55:42 GMT"/>
 		</widget>
 	      </child>