fixes

app/controllers/posts_controller.rb

@@ -37,6 +37,9 @@ class PostsController < ApplicationController
       format.js
     end
   end
+  
+  def error
+  end
 
 private
   def search_error(exception)

app/logical/anonymous_user.rb

@@ -112,6 +112,10 @@ class AnonymousUser
     []
   end
   
+  def email
+    ""
+  end
+  
   def last_forum_read_at
     Time.now
   end

app/mailers/maintenance/user/login_reminder_mailer.rb

@@ -3,7 +3,9 @@ module Maintenance
     class LoginReminderMailer < ActionMailer::Base
       def notice(user)
         @user = user
-        mail(:to => user.email, :subject => "#{Danbooru.config.app_name} login reminder", :from => Danbooru.config.contact_email)
+        if user.email.present?
+          mail(:to => user.email, :subject => "#{Danbooru.config.app_name} login reminder", :from => Danbooru.config.contact_email)
+        end
       end
     end
   end