fixes #1108

app/controllers/comments_controller.rb

@@ -76,6 +76,9 @@ private
     @posts.all
     respond_with(@posts) do |format|
       format.html {render :action => "index_by_post"}
+      format.xml do
+        render :xml => @posts.to_xml(:root => "posts")
+      end
     end
   end
 
@@ -83,6 +86,9 @@ private
     @comments = Comment.search(params[:search]).order("comments.id DESC").paginate(params[:page], :search_count => params[:search])
     respond_with(@comments) do |format|
       format.html {render :action => "index_by_comment"}
+      format.xml do
+        render :xml => @comments.to_xml(:root => "comments")
+      end
     end
   end