--- a/app/controllers/pastes_controller.rb	Tue Oct 15 18:56:10 2013 +0000
+++ b/app/controllers/pastes_controller.rb	Wed Oct 16 04:00:09 2013 +0900
@@ -48,7 +48,7 @@
           format.html { redirect_to @paste, :notice => 'Paste was successfully created.' }
           format.json { render :json => @paste, :status => :created, :location => @paste }
         else
-          flash[:alert] = @paste.errors.full_messages.to_sentence
+          flash.now[:alert] = @paste.errors.full_messages.to_sentence
           format.html { render :action => "new" }
           format.json { render :json => @paste.errors, :status => :unprocessable_entity }
         end
@@ -70,7 +70,7 @@
       expire_page :controller => 'pastes', :action => 'show', :id => @paste.id
       redirect_to root_path, :notice => "Paste ##{params[:id]} deleted"
     else
-      flash[:alert] = @paste.errors.full_messages.to_sentence
+      flash.now[:alert] = @paste.errors.full_messages.to_sentence
       render :show
     end
   end