Index: app/helpers/application_helper.rb
===================================================================
--- app/helpers/application_helper.rb	(revision 17346)
+++ app/helpers/application_helper.rb	(working copy)
@@ -19,6 +19,7 @@
 
 require 'forwardable'
 require 'cgi'
+require 'htmlentities'
 
 module ApplicationHelper
   include Redmine::WikiFormatting::Macros::Definitions
@@ -740,6 +741,7 @@
       link_project = project
       esc, all, page, title = $1, $2, $3, $5
       if esc.nil?
+        page = decode_html_entities(page)
         if page =~ /^\#(.+)$/
           anchor = sanitize_anchor_name($1)
           url = "##{anchor}"
@@ -1526,4 +1528,9 @@
     name = identifier.gsub(%r{^"(.*)"$}, "\\1")
     return CGI.unescapeHTML(name)
   end
+
+  def decode_html_entities(page)
+    @coder ||= HTMLEntities.new()
+    @coder.decode(page)
+  end
 end