diff --git a/app/views/welcome/index.html.erb b/app/views/welcome/index.html.erb
index 2d4fdfc05..000f52e30 100644
--- a/app/views/welcome/index.html.erb
+++ b/app/views/welcome/index.html.erb
@@ -1,5 +1,7 @@
 <h2><%= l(:label_home) %></h2>
 
+<%= "Ö".downcase %>
+
 <div class="splitcontentleft">
   <%= textilizable Setting.welcome_text %>
   <% if @news.any? %>
diff --git a/lib/plugins/acts_as_searchable/lib/acts_as_searchable.rb b/lib/plugins/acts_as_searchable/lib/acts_as_searchable.rb
index fa5fa202b..37c8b400d 100644
--- a/lib/plugins/acts_as_searchable/lib/acts_as_searchable.rb
+++ b/lib/plugins/acts_as_searchable/lib/acts_as_searchable.rb
@@ -86,7 +86,7 @@ module Redmine
             columns = searchable_options[:columns]
             columns = columns[0..0] if options[:titles_only]
 
-            token_clauses = columns.collect {|column| "(LOWER(#{column}) LIKE ?)"}
+            token_clauses = columns.collect {|column| "(LOWER(#{column}) LIKE LOWER(?))"}
 
             if !options[:titles_only] && searchable_options[:search_custom_fields]
               searchable_custom_fields = CustomField.where(:type => "#{self.name}CustomField", :searchable => true)
@@ -97,7 +97,7 @@ module Redmine
               fields_by_visibility.each do |visibility, fields|
                 ids = fields.map(&:id).join(',')
                 sql = "#{table_name}.id IN (SELECT cfs.customized_id FROM #{CustomValue.table_name} cfs" +
-                  " WHERE cfs.customized_type='#{self.name}' AND cfs.customized_id=#{table_name}.id AND LOWER(cfs.value) LIKE ?" +
+                  " WHERE cfs.customized_type='#{self.name}' AND cfs.customized_id=#{table_name}.id AND LOWER(cfs.value) LIKE LOWER(?)" +
                   " AND cfs.custom_field_id IN (#{ids})" +
                   " AND #{visibility})"
                 token_clauses << sql
@@ -106,7 +106,7 @@ module Redmine
 
             sql = (['(' + token_clauses.join(' OR ') + ')'] * tokens.size).join(options[:all_words] ? ' AND ' : ' OR ')
 
-            tokens_conditions = [sql, * (tokens.collect {|w| "%#{w.downcase}%"} * token_clauses.size).sort]
+            tokens_conditions = [sql, * (tokens.collect {|w| "%#{w}%"} * token_clauses.size).sort]
 
             scope = (searchable_options[:scope] || self)
             if scope.is_a? Proc
diff --git a/test/unit/search_test.rb b/test/unit/search_test.rb
index c98982e8a..48f39033d 100644
--- a/test/unit/search_test.rb
+++ b/test/unit/search_test.rb
@@ -1,3 +1,5 @@
+# encoding: utf-8
+#
 # Redmine - project management software
 # Copyright (C) 2006-2014  Jean-Philippe Lang
 #
@@ -137,6 +139,13 @@ class SearchTest < ActiveSupport::TestCase
     assert_equal issue, r.first
   end
 
+  def test_search_should_not_use_ruby_downcase
+    issue = Issue.generate!(:subject => "Special chars: ÖÖ")
+    r = Issue.search_results('%ÖÖ%')
+    assert_equal 1, r.size
+    assert_equal issue, r.first
+  end
+
   private
 
   def remove_permission(role, permission)