Index: lib/reorder_page_controller_extensions.rb
===================================================================
--- lib/reorder_page_controller_extensions.rb	(revision 490)
+++ lib/reorder_page_controller_extensions.rb	(working copy)
@@ -3,7 +3,7 @@
     if request.post?
       sort_order = params[:sort_order].to_s.split(',').map { |i| Integer(i) rescue nil }.compact
       sort_order.each_with_index do |id, index|
-        Page.update(id, :position => index)
+        Page.update_all(['position = ?', index], ['id = ?', id])
       end
       redirect_to page_index_url
     else