diff --git a/app/controllers/wiki_controller.rb b/app/controllers/wiki_controller.rb
index a3000ed..3395a75 100644
--- a/app/controllers/wiki_controller.rb
+++ b/app/controllers/wiki_controller.rb
@@ -164,7 +164,7 @@ class WikiController < ApplicationController
 		params[:course_id] = Course.find(:first, :conditions => ['short_name = ?', params[:course_id]], :order => 'period desc').id if !params[:course_id].is_numeric? and !Course.find_by_short_name(params[:course_id]).nil?
 		@course = Course.find(params[:course_id])
 
-		params[:id] = @course.wiki_pages.find_by_title(params[:id]).id if params[:id] and !params[:id].is_numeric? and !@course.wiki_pages.find_by_title(params[:id]).nil?
+		params[:id] = @course.wiki_pages.find_by_canonical_title(params[:id].pretty_url).id if params[:id] and !params[:id].is_numeric? and !@course.wiki_pages.find_by_canonical_title(params[:id].pretty_url).nil?
 		@wiki_page = params[:id] ? @course.wiki_pages.find(params[:id]) : WikiPage.new(params[:wiki_page])
 	end
 
diff --git a/app/models/wiki_page.rb b/app/models/wiki_page.rb
index d27dc79..30ba4ab 100644
--- a/app/models/wiki_page.rb
+++ b/app/models/wiki_page.rb
@@ -27,6 +27,7 @@ class WikiPage < ActiveRecord::Base
 	acts_as_paranoid_versioned
 	self.non_versioned_columns << 'position'
 	self.non_versioned_columns << 'deleted_at'
+	self.non_versioned_columns << 'canonical_title'
 
 	# Associacoes
 	belongs_to :course
@@ -35,8 +36,13 @@ class WikiPage < ActiveRecord::Base
 	# Valicacao
 	generate_validations
 	validates_uniqueness_of :title, :scope => :course_id
+	validates_uniqueness_of :canonical_title, :scope => :course_id
 	validates_format_of :title, :with => /^[^0-9]/
 
+	def before_validation
+		self.canonical_title = self.title.pretty_url
+	end
+
 	def validate
 		begin
 			self.content.format_wiki
@@ -46,7 +52,7 @@ class WikiPage < ActiveRecord::Base
 	end
 
 	def to_param
-		self.title.match(/^[-_a-z0-9]*$/i).nil? ? self.id.to_s : self.title
+		self.canonical_title
 	end
 
 	def WikiPage.diff(from, to)
diff --git a/config/initializers/nasty_hacks.rb b/config/initializers/nasty_hacks.rb
index 59e61bc..2edbb19 100644
--- a/config/initializers/nasty_hacks.rb
+++ b/config/initializers/nasty_hacks.rb
@@ -16,6 +16,14 @@ class String
 	%w[auto_link excerpt highlight sanitize simple_format strip_tags truncate word_wrap].each do |method|
 		eval "def #{method}(*args); ActionController::Base.helpers.#{method}(self, *args); end"
 	end
+
+	def pretty_url
+		self.mb_chars.normalize(:kd).
+			gsub(/[^\x00-\x7F]/n,'').
+			gsub(/[^a-z._0-9 -]/i,"").
+			gsub(/ +/,"_").
+			downcase.to_s
+	end
 end
 
 class Array
diff --git a/db/migrate/20090907095812_canonical.rb b/db/migrate/20090907095812_canonical.rb
new file mode 100644
index 0000000..a496ca0
--- /dev/null
+++ b/db/migrate/20090907095812_canonical.rb
@@ -0,0 +1,12 @@
+class Canonical< ActiveRecord::Migration
+	def self.up
+		add_column :wiki_pages, :canonical_title, :string
+		WikiPage.find(:all).each do |wiki|
+			wiki.update_attribute(:canonical_title, wiki.title.pretty_url)
+		end
+	end
+
+	def self.down
+		remove_column :wiki_pages, :canonical_title
+	end
+end
diff --git a/db/schema.rb b/db/schema.rb
index 404a5f2..fba8f11 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -1,5 +1,5 @@
 # This file is auto-generated from the current state of the database. Instead of editing this file, 
-# please use the migrations feature of ActiveRecord to incrementally modify your database, and
+# please use the migrations feature of Active Record to incrementally modify your database, and
 # then regenerate this schema definition.
 #
 # Note that this schema.rb definition is the authoritative source for your database schema. If you need
@@ -9,7 +9,7 @@
 #
 # It's strongly recommended to check this file into your version control system.
 
-ActiveRecord::Schema.define(:version => 36) do
+ActiveRecord::Schema.define(:version => 20090907095812) do
 
   create_table "attachments", :force => true do |t|
     t.string   "file_name",     :null => false
@@ -102,8 +102,8 @@ ActiveRecord::Schema.define(:version => 36) do
     t.datetime "updated_at"
   end
 
-  add_index "sessions", ["updated_at"], :name => "index_sessions_on_updated_at"
   add_index "sessions", ["session_id"], :name => "index_sessions_on_session_id"
+  add_index "sessions", ["updated_at"], :name => "index_sessions_on_updated_at"
 
   create_table "users", :force => true do |t|
     t.string   "login",                                 :null => false
@@ -137,16 +137,17 @@ ActiveRecord::Schema.define(:version => 36) do
   end
 
   create_table "wiki_pages", :force => true do |t|
-    t.integer  "course_id",   :null => false
-    t.integer  "user_id",     :null => false
-    t.integer  "version",     :null => false
-    t.string   "description", :null => false
-    t.string   "title",       :null => false
-    t.text     "content",     :null => false
+    t.integer  "course_id",       :null => false
+    t.integer  "user_id",         :null => false
+    t.integer  "version",         :null => false
+    t.string   "description",     :null => false
+    t.string   "title",           :null => false
+    t.text     "content",         :null => false
     t.datetime "created_at"
     t.datetime "updated_at"
     t.integer  "position"
     t.datetime "deleted_at"
+    t.string   "canonical_title"
   end
 
 end