Index: test/functional/search_controller_test.rb
===================================================================
--- test/functional/search_controller_test.rb	(revision 1212)
+++ test/functional/search_controller_test.rb	(working copy)
@@ -25,6 +25,14 @@
     assert assigns(:results).include?(Project.find(1))
   end
   
+  def test_search_all_projects
+    @request.session[:user_id] = 1 # admin
+    get :index, :id => 1, :q => 'Error 281', :all_projects => '1', :submit => 'Search'
+    results = assigns(:results)
+    assert_not_nil results
+    assert_equal 2, results.size
+  end
+  
   def test_search_without_searchable_custom_fields
     CustomField.update_all "searchable = #{ActiveRecord::Base.connection.quoted_false}"
     
Index: test/fixtures/issues.yml
===================================================================
--- test/fixtures/issues.yml	(revision 1212)
+++ test/fixtures/issues.yml	(working copy)
@@ -52,7 +52,7 @@
   id: 4
   fixed_version_id: 
   category_id: 
-  description: Issue on project 2
+  description: Issue on project 2. Error 281 was encountered.
   tracker_id: 1
   assigned_to_id: 
   author_id: 2
Index: app/controllers/search_controller.rb
===================================================================
--- app/controllers/search_controller.rb	(revision 1212)
+++ app/controllers/search_controller.rb	(working copy)
@@ -26,6 +26,7 @@
     @question.strip!
     @all_words = params[:all_words] || (params[:submit] ? false : true)
     @titles_only = !params[:titles_only].nil?
+    @all_projects = !params[:all_projects].nil?
     
     offset = nil
     begin; offset = params[:offset].to_time if params[:offset]; rescue; end
@@ -35,19 +36,19 @@
       redirect_to :controller => "issues", :action => "show", :id => $1
       return
     end
-    
+
     if params[:id]
       find_project
       return unless check_project_privacy
     end
-    
+  
     if @project
-      # only show what the user is allowed to view
-      @object_types = %w(issues news documents changesets wiki_pages messages)
-      @object_types = @object_types.select {|o| User.current.allowed_to?("view_#{o}".to_sym, @project)}
-      
-      @scope = @object_types.select {|t| params[t]}
-      @scope = @object_types if @scope.empty?
+      object_types_and_scope(@project)
+      if @all_projects
+        @projects = Project.find(:all, :conditions => Project.visible_by(User.current))
+      else
+        @projects = [@project]
+      end
     else
       @object_types = @scope = %w(projects)
     end
@@ -65,15 +66,19 @@
       like_tokens = @tokens.collect {|w| "%#{w.downcase}%"}      
       @results = []
       limit = 10
-      if @project        
-        @scope.each do |s|
-          @results += s.singularize.camelcase.constantize.search(like_tokens, @project,
-            :all_words => @all_words,
-            :titles_only => @titles_only,
-            :limit => (limit+1),
-            :offset => offset,
-            :before => params[:previous].nil?)
+      if @projects
+        @projects.each do |project|
+          object_types_and_scope(project)
+          @scope.each do |s|
+            @results += s.singularize.camelcase.constantize.search(like_tokens, project,
+              :all_words => @all_words,
+              :titles_only => @titles_only,
+              :limit => (limit+1),
+              :offset => offset,
+              :before => params[:previous].nil?)
+          end
         end
+        object_types_and_scope(@project) if @project #make sure object types and scope match current project last
         @results = @results.sort {|a,b| b.event_datetime <=> a.event_datetime}
         if params[:previous].nil?
           @pagination_previous_date = @results[0].event_datetime if offset && @results[0]
@@ -109,4 +114,12 @@
   rescue ActiveRecord::RecordNotFound
     render_404
   end
+  
+  # only show what the user is allowed to view
+  def object_types_and_scope(project)
+    @object_types = %w(issues news documents changesets wiki_pages messages)
+    @object_types = @object_types.select {|o| User.current.allowed_to?("view_#{o}".to_sym, @project)}
+    @scope = @object_types.select {|t| params[t]}
+    @scope = @object_types if @scope.empty?
+  end
 end
Index: app/views/search/index.rhtml
===================================================================
--- app/views/search/index.rhtml	(revision 1212)
+++ app/views/search/index.rhtml	(working copy)
@@ -11,6 +11,9 @@
 <br />
 <label><%= check_box_tag 'all_words', 1, @all_words %> <%= l(:label_all_words) %></label>
 <label><%= check_box_tag 'titles_only', 1, @titles_only %> <%= l(:label_search_titles_only) %></label>
+<% if @project %>
+  <label><%= check_box_tag 'all_projects', 1, @all_projects %> <%= l(:label_project_all) %></label>
+<% end %>
 </p>
 <%= submit_tag l(:button_submit), :name => 'submit' %>
 <% end %>