diff --git a/app/views/issues/_form.html.erb b/app/views/issues/_form.html.erb
index fdf729140..4fa41625f 100644
--- a/app/views/issues/_form.html.erb
+++ b/app/views/issues/_form.html.erb
@@ -27,6 +27,12 @@
 
 <% if @issue.safe_attribute? 'subject' %>
 <p><%= f.text_field :subject, :size => 80, :maxlength => 255, :required => true %></p>
+<% if @issue.new_record? %>
+<div class="notice">
+  <div id="similar_issues">
+  </div>
+</div>
+<% end %>
 <% end %>
 
 <% if @issue.safe_attribute? 'description' %>
@@ -56,9 +62,27 @@
 <% heads_for_wiki_formatter %>
 
 <%= javascript_tag do %>
+<% if @issue.new_record? %>
+options = {
+  response: function(e,ui){
+    if(ui.content.length>0){
+      $('#similar_issues').html('<%= l(:text_following_issues_might_be_similar) %>  <%= link_to_function l(:button_hide), "$('#similar_issues').html('');" %><ul></ul>');
+      $.each(ui.content, function(index,elm) { $('#similar_issues ul').append('<li><a href=\"/issues/' + elm.id + '\">' + elm.label + '</li>'); });
+    }else{
+      $('#similar_issues').html('');
+    }
+  },
+  open: function(e,ui){ $(".ui-autocomplete").hide(); }
+}
+observeAutocompleteField('issue_subject', '<%= "#{escape_javascript auto_complete_issues_path(:project_id => @issue.project, :scope => Setting.cross_project_subtasks, :status => @issue.closed? ? 'c' : 'o', :issue_id => @issue.id)}" %>', options);
+<% end %>
 $(document).ready(function(){
   $("#issue_tracker_id, #issue_status_id").each(function(){
     $(this).val($(this).find("option[selected=selected]").val());
   });
+  <% if @issue.new_record? %>
+  $("#issue_subject").keyup(function(){if($(this).val().length<2){$('#similar_issues').html('');}});
+  $("#issue_subject").removeClass("autocomplete");
+  <% end %>
 });
 <% end %>
diff --git a/config/locales/en.yml b/config/locales/en.yml
index 8fcc2262a..73b063f74 100644
--- a/config/locales/en.yml
+++ b/config/locales/en.yml
@@ -1231,6 +1231,7 @@ en:
   text_select_apply_tracker: "Select tracker"
   text_avatar_server_config_html: The current avatar server is <a href="%{url}">%{url}</a>. You can configure it in config/configuration.yml.
   text_no_subject: no subject
+  text_following_issues_might_be_similar: The following issues might be similar.
 
 
   default_role_manager: Manager
diff --git a/public/stylesheets/application.css b/public/stylesheets/application.css
index 5f8ade106..4e6427d2c 100644
--- a/public/stylesheets/application.css
+++ b/public/stylesheets/application.css
@@ -775,6 +775,7 @@ html>body .tabular p {overflow:hidden;}
 
 .tabular input, .tabular select {max-width:95%}
 .tabular textarea {width:95%; resize:vertical;}
+.tabular div.notice {padding-left: 180px}
 
 .tabular label{
   font-weight: bold;
diff --git a/public/stylesheets/responsive.css b/public/stylesheets/responsive.css
index aa5502ee6..43d9b1a5f 100644
--- a/public/stylesheets/responsive.css
+++ b/public/stylesheets/responsive.css
@@ -749,6 +749,9 @@
     width: auto;
     max-width: 95%;
   }
+  .tabular div.notice {
+    padding-left: 0
+  }
 
   /* new issue form */
   #all_attributes p:first-child {