fixes #1512

app/models/forum_post.rb

@@ -97,7 +97,10 @@ class ForumPost < ActiveRecord::Base
   end
 
   def update_topic_updated_at_on_destroy
-    topic.update_column(:updated_at, ForumPost.where(:topic_id => topic.id).maximum(:updated_at))
+    max = ForumPost.where(:topic_id => topic.id).maximum(:updated_at)
+    if max
+      topic.update_column(:updated_at, max)
+    end
   end
 
   def initialize_creator

app/models/user.rb

@@ -40,7 +40,8 @@ class User < ActiveRecord::Base
   before_create :promote_to_admin_if_first_user
   has_many :feedback, :class_name => "UserFeedback", :dependent => :destroy
   has_many :posts, :foreign_key => "uploader_id"
-  has_one :ban
+  has_many :bans, :order => "bans.id desc"
+  has_one :recent_ban, :class_name => "Ban", :order => "bans.id desc"
   has_many :subscriptions, :class_name => "TagSubscription", :foreign_key => "creator_id", :order => "name"
   has_many :note_versions, :foreign_key => "updater_id"
   has_many :dmails, :foreign_key => "owner_id", :order => "dmails.id desc"