diff --git a/app/controllers/my_controller.rb b/app/controllers/my_controller.rb
index f3d1b2a7..64a561f9 100644
--- a/app/controllers/my_controller.rb
+++ b/app/controllers/my_controller.rb
@@ -90,8 +90,9 @@ class MyController < ApplicationController
   # The block is added on top of the page
   # params[:block] : id of the block to add
   def add_block
-    @user = self.logged_in_user
     block = params[:block]
+    render(:nothing => true) and return unless block && (BLOCKS.keys.include? block)
+    @user = self.logged_in_user
     # remove if already present in a group
     %w(top left right).each {|f| (session[:page_layout][f] ||= []).delete block }
     # add it on top
diff --git a/doc/CHANGELOG b/doc/CHANGELOG
index 89a3c5c1..c93a87c7 100644
--- a/doc/CHANGELOG
+++ b/doc/CHANGELOG
@@ -5,7 +5,12 @@ Copyright (C) 2006-2007  Jean-Philippe Lang
 http://redmine.rubyforge.org/
 
 
-== 02/18/2006 v0.4.2
+== xx/xx/2007 v0.4.3
+
+* fixed: error when clicking "add" with no block selected on my/page_layout
+
+
+== 02/18/2007 v0.4.2
 
 * Rails 1.2 is now required
 * settings are now stored in the database and editable through the application in: Admin -> Settings (config_custom.rb is no longer used)
@@ -33,12 +38,12 @@ http://redmine.rubyforge.org/
 * fixed: crash when a new user try to edit its "my page" layout
 
 
-== 01/03/2006 v0.4.1
+== 01/03/2007 v0.4.1
 
 * fixed: emails have no recipient when one of the project members has notifications disabled
 
 
-== 01/02/2006 v0.4.0
+== 01/02/2007 v0.4.0
 
 * simple SVN browser added (just needs svn binaries in PATH)
 * comments can now be added on news