diff --git a/README b/README.md
similarity index 82%
rename from README
rename to README.md
index 27e5a5a74..8e5948adb 100644
--- a/README
+++ b/README.md
@@ -1,23 +1,23 @@
-=== Installation
+### Installation
 
 It is recommended that you install Danbooru on a Debian-based system
-since most of the required packages are available on APT.  Danbooru
+since most of the required packages are available on APT. Danbooru
 has been successfully installed on Fedora, CentOS, FreeBSD, and OS X.
 The INSTALL.debian install script is straightforward and should be
-simple to adapt for other platforms.  If you want something similar to
-Danbooru that is easier to install, try Shimmie
-(http://code.shishnet.org/shimmie2/). Shimmie uses PHP and MySQL and
-should be straightforward to install on most hosts.
+simple to adapt for other platforms.
 
 For best performance, you will need at least 256MB of RAM for
 PostgreSQL and Rails. The memory requirement will grow as your
-database gets bigger.
+database gets bigger. 
+
+On production Danbooru uses PostgreSQL 9.4, but any 9.x release should
+work.
 
 Use your operating system's package management system whenever
 possible.  This will simplify the process of installing init scripts,
 which will not always happen when compiling from source.
 
-=== Troubleshooting
+### Troubleshooting
 
 These instructions won't work for everyone. If your setup is not
 working, here are the steps I usually recommend to people:
@@ -37,7 +37,7 @@ debug your Nginx configuration file.
 
 4) Check all log files.
 
-=== IQDB Integration
+### IQDB Integration
 
 In order to enable IQDB integration, you must compile and run the IQDB server somewhere (preferably on the local server). There are two Danbooru configuration settings that you must then set: iqdb_hostname_and_port and iqdb_file.
 
diff --git a/app/assets/javascripts/uploads.js b/app/assets/javascripts/uploads.js
index 81b3a1798..d08b7bb0f 100644
--- a/app/assets/javascripts/uploads.js
+++ b/app/assets/javascripts/uploads.js
@@ -46,7 +46,11 @@
   Danbooru.Upload.initialize_info_bookmarklet = function() {
     $("#source-info ul").hide();
     $("#fetch-data-bookmarklet").click(function(e) {
-      $.get(e.target.href).success(Danbooru.Upload.fill_source_info);
+      var xhr = $.get(e.target.href);
+      xhr.success(Danbooru.Upload.fill_source_info);
+      xhr.fail(function(data) {
+        $("#source-info span#loading-data").html("Error: " + data.responseJSON["message"])
+      });
       e.preventDefault();
     });
     $("#fetch-data-bookmarklet").trigger("click");
@@ -63,7 +67,11 @@
         Danbooru.error("Error: Source is not a URL");
       } else {
         $("#source-info span#loading-data").show();
-        $.get("/source.json?url=" + encodeURIComponent(source)).success(Danbooru.Upload.fill_source_info);
+        var xhr = $.get("/source.json?url=" + encodeURIComponent(source));
+        xhr.success(Danbooru.Upload.fill_source_info);
+        xhr.fail(function(data) {
+          $("#source-info span#loading-data").html("Error: " + data.responseJSON["message"])
+        });
       }
       e.preventDefault();
     });
diff --git a/app/controllers/sources_controller.rb b/app/controllers/sources_controller.rb
index b098ac5f7..7df7cd2e3 100644
--- a/app/controllers/sources_controller.rb
+++ b/app/controllers/sources_controller.rb
@@ -12,4 +12,14 @@ class SourcesController < ApplicationController
       end
     end
   end
+
+private
+
+  def rescue_exception(exception)
+    respond_with do |format|
+      format.json do
+        render :json => {:message => exception.to_s}, :status => :error
+      end
+    end
+  end
 end
diff --git a/app/models/post.rb b/app/models/post.rb
index 855f40550..a8a2eac5c 100644
--- a/app/models/post.rb
+++ b/app/models/post.rb
@@ -20,6 +20,7 @@ class Post < ActiveRecord::Base
   before_save :update_tag_post_counts
   before_save :set_tag_counts
   before_save :set_pool_category_pseudo_tags
+  before_create :autoban
   before_validation :strip_source
   before_validation :initialize_uploader, :on => :create
   before_validation :parse_pixiv_id
@@ -290,6 +291,12 @@ class Post < ActiveRecord::Base
     def disapproved_by?(user)
       PostDisapproval.where(:user_id => user.id, :post_id => id).exists?
     end
+
+    def autoban
+      if has_tag?("banned_artist")
+        self.is_banned = true
+      end
+    end
   end
 
   module PresenterMethods
@@ -1490,7 +1497,13 @@ class Post < ActiveRecord::Base
     def update_iqdb_async
       if Danbooru.config.iqdb_hostname_and_port && File.exists?(preview_file_path)
         Danbooru.config.all_server_hosts.each do |host|
-          delay(:queue => host).update_iqdb
+          if has_tag?("ugoira")
+            run_at = 10.seconds.from_now
+          else
+            run_at = Time.from_now
+          end
+
+          delay(:queue => host, :run_at => run_at).update_iqdb
         end
       end
     end
@@ -1558,6 +1571,7 @@ class Post < ActiveRecord::Base
   def reload(options = nil)
     super
     reset_tag_array_cache
+    @pools = nil
     @tag_categories = nil
     @typed_tags = nil
     self
diff --git a/app/models/tag.rb b/app/models/tag.rb
index 429d190ac..7ccd92ca4 100644
--- a/app/models/tag.rb
+++ b/app/models/tag.rb
@@ -192,6 +192,11 @@ class Tag < ActiveRecord::Base
         if category
           category_id = categories.value_for(category)
 
+          # in case a category change hasn't propagated to this server yet,
+          # force an update the local cache. This may get overwritten in the
+          # next few lines if the category is changed.
+          tag.update_category_cache
+
           if category_id != tag.category && !tag.is_locked? && (CurrentUser.is_builder? || tag.post_count <= 50)
             tag.update_column(:category, category_id)
             tag.update_category_cache_for_all
diff --git a/app/models/tag_alias.rb b/app/models/tag_alias.rb
index bf6703c1a..3e2841ca7 100644
--- a/app/models/tag_alias.rb
+++ b/app/models/tag_alias.rb
@@ -198,11 +198,15 @@ class TagAlias < ActiveRecord::Base
 
   def rename_wiki_and_artist
     antecedent_wiki = WikiPage.titled(antecedent_name).first
-    if antecedent_wiki.present? && WikiPage.titled(consequent_name).blank?
-      CurrentUser.scoped(creator, creator_ip_addr) do
-        antecedent_wiki.update_attributes(
-          :title => consequent_name
-        )
+    if antecedent_wiki.present? 
+      if WikiPage.titled(consequent_name).blank?
+        CurrentUser.scoped(creator, creator_ip_addr) do
+          antecedent_wiki.update_attributes(
+            :title => consequent_name
+          )
+        end
+      else
+        update_forum_topic_for_wiki_conflict
       end
     end
 
@@ -249,6 +253,16 @@ class TagAlias < ActiveRecord::Base
     end
   end
 
+  def update_forum_topic_for_wiki_conflict
+    if forum_topic
+      CurrentUser.scoped(User.admins.first, "127.0.0.1") do
+        forum_topic.posts.create(
+          :body => "The tag alias [[#{antecedent_name}]] -> [[#{consequent_name}]] has conflicting wiki pages. [[#{consequent_name}]] should be updated to include information from [[#{antecedent_name}]] if necessary."
+        )
+      end
+    end
+  end
+
   def reject!
     update_column(:status, "deleted")
     clear_all_cache
diff --git a/app/views/posts/show.html.erb b/app/views/posts/show.html.erb
index 267dff155..73e0d4a07 100644
--- a/app/views/posts/show.html.erb
+++ b/app/views/posts/show.html.erb
@@ -149,7 +149,7 @@
   <meta name="always-resize-images" content="<%= CurrentUser.user.always_resize_images? %>">
   <meta property="og:title" content="<%= @post.presenter.humanized_essential_tag_string %> - <%= Danbooru.config.app_name %>">
   <meta property="og:description" content="<%= @post.presenter.humanized_tag_string %>">
-  <meta property="og:image" content="<%= @post.preview_file_url %>">
+  <meta property="og:image" content="http://<%= Danbooru.config.hostname %><%= @post.large_file_url %>">
 
   <!-- Twitter properties -->
   <% if @post.twitter_card_supported? %>
diff --git a/test/factories/tag.rb b/test/factories/tag.rb
index f0b988acf..24f5dace8 100644
--- a/test/factories/tag.rb
+++ b/test/factories/tag.rb
@@ -1,6 +1,6 @@
 FactoryGirl.define do
   factory(:tag) do
-    name {Faker::Name.first_name.downcase}
+    name {"#{Faker::Name.first_name.downcase}#{rand(1000)}"}
     post_count 0
     category {Tag.categories.general}
     related_tags ""
diff --git a/test/fixtures/vcr_cassettes/ugoira-converter.yml b/test/fixtures/vcr_cassettes/ugoira-converter.yml
index 46f9c0d57..2f5589ccc 100644
--- a/test/fixtures/vcr_cassettes/ugoira-converter.yml
+++ b/test/fixtures/vcr_cassettes/ugoira-converter.yml
@@ -749,7 +749,7 @@ http_interactions:
   recorded_at: Wed, 22 Oct 2014 23:29:57 GMT
 - request:
     method: get
-    uri: http://i1.pixiv.net/img-zip-ugoira/img/2014/10/05/23/42/23/46378654_ugoira1920x1080.zip
+    uri: http://i3.pixiv.net/img-zip-ugoira/img/2014/10/05/23/42/23/46378654_ugoira1920x1080.zip
     body:
       encoding: US-ASCII
       string: ''
diff --git a/test/functional/bulk_update_requests_controller_test.rb b/test/functional/bulk_update_requests_controller_test.rb
index 74d1357dd..9c64c2d43 100644
--- a/test/functional/bulk_update_requests_controller_test.rb
+++ b/test/functional/bulk_update_requests_controller_test.rb
@@ -44,9 +44,9 @@ class BulkUpdateRequestsControllerTest < ActionController::TestCase
 
       context "for the creator" do
         should "succeed" do
-          assert_difference("BulkUpdateRequest.count", -1) do
-            delete :destroy, {:id => @bulk_update_request.id}, {:user_id => @user.id}
-          end
+          delete :destroy, {:id => @bulk_update_request.id}, {:user_id => @user.id}
+          @bulk_update_request.reload
+          assert_equal("rejected", @bulk_update_request.status)
         end
       end
 
@@ -64,9 +64,9 @@ class BulkUpdateRequestsControllerTest < ActionController::TestCase
 
       context "for an admin" do
         should "succeed" do
-          assert_difference("BulkUpdateRequest.count", -1) do
-            delete :destroy, {:id => @bulk_update_request.id}, {:user_id => @admin.id}
-          end
+          delete :destroy, {:id => @bulk_update_request.id}, {:user_id => @admin.id}
+          @bulk_update_request.reload
+          assert_equal("rejected", @bulk_update_request.status)
         end
       end
     end
diff --git a/test/functional/tag_aliases_controller_test.rb b/test/functional/tag_aliases_controller_test.rb
index c488220ce..30c99ce70 100644
--- a/test/functional/tag_aliases_controller_test.rb
+++ b/test/functional/tag_aliases_controller_test.rb
@@ -72,14 +72,6 @@ class TagAliasesControllerTest < ActionController::TestCase
       end
     end
 
-    context "create action" do
-      should "create a tag alias" do
-        assert_difference("TagAlias.count", 1) do
-          post :create, {:tag_alias => {:antecedent_name => "xxx", :consequent_name => "yyy"}}, {:user_id => @user.id}
-        end
-      end
-    end
-
     context "destroy action" do
       setup do
         @tag_alias = FactoryGirl.create(:tag_alias)
diff --git a/test/functional/tag_implications_controller_test.rb b/test/functional/tag_implications_controller_test.rb
index 15db44959..8fa68f1d7 100644
--- a/test/functional/tag_implications_controller_test.rb
+++ b/test/functional/tag_implications_controller_test.rb
@@ -75,14 +75,6 @@ class TagImplicationsControllerTest < ActionController::TestCase
       end
     end
 
-    context "create action" do
-      should "create a tag implication" do
-        assert_difference("TagImplication.count", 1) do
-          post :create, {:tag_implication => {:antecedent_name => "xxx", :consequent_name => "yyy"}}, {:user_id => @user.id}
-        end
-      end
-    end
-
     context "destroy action" do
       setup do
         CurrentUser.scoped(@user, "127.0.0.1") do
diff --git a/test/unit/downloads/deviant_art_test.rb b/test/unit/downloads/deviant_art_test.rb
index 3d7f7f37f..bf50c7e56 100644
--- a/test/unit/downloads/deviant_art_test.rb
+++ b/test/unit/downloads/deviant_art_test.rb
@@ -7,13 +7,13 @@ module Downloads
         @source = "http://mochikko.deviantart.com/art/RESOLUTION-339610451"
         @tempfile = Tempfile.new("danbooru-test")
         @download = Downloads::File.new(@source, @tempfile.path)
-        VCR.use_cassette("download-deviant-art-html", :record => :new_episodes) do
+        VCR.use_cassette("download-deviant-art-html", :record => :none) do
           @download.download!
         end
       end
 
       should "set the direct image link as the source" do
-        assert_equal("http://www.deviantart.com/download/339610451/resolution_by_mochikko-d5m713n.jpg?token=f828643e6e86a658e80f362745a0b20e20880fc6&ts=1414021578", @download.source)
+        assert_equal("http://fc03.deviantart.net/fs71/f/2012/330/e/7/resolution_by_mochikko-d5m713n.jpg", @download.source)
       end
 
       should "work" do
diff --git a/test/unit/downloads/pixiv_test.rb b/test/unit/downloads/pixiv_test.rb
index 972623ce7..948055273 100644
--- a/test/unit/downloads/pixiv_test.rb
+++ b/test/unit/downloads/pixiv_test.rb
@@ -231,8 +231,8 @@ module Downloads
         should "download the full size image instead of the thumbnail" do
           assert_rewritten(@p0_full_size_image_3, @p0_large_thumbnail, "rewrite-pixiv-new-manga-p0-large-thumbnail")
           assert_rewritten(@p1_full_size_image_3, @p1_large_thumbnail, "rewrite-pixiv-new-manga-p1-large-thumbnail")
-          assert_downloaded(@p0_file_size, @p0_large_thumbnail, "download-pixiv-new-manga-p0-large-thumbnail", :all)
-          assert_downloaded(@p1_file_size, @p1_large_thumbnail, "download-pixiv-new-manga-p1-large-thumbnail", :all)
+          assert_downloaded(@p0_file_size, @p0_large_thumbnail, "download-pixiv-new-manga-p0-large-thumbnail")
+          assert_downloaded(@p1_file_size, @p1_large_thumbnail, "download-pixiv-new-manga-p1-large-thumbnail")
         end
       end
 
diff --git a/test/unit/pool_test.rb b/test/unit/pool_test.rb
index 4f79e8c6f..9e0df05df 100644
--- a/test/unit/pool_test.rb
+++ b/test/unit/pool_test.rb
@@ -87,7 +87,7 @@ class PoolTest < ActiveSupport::TestCase
 
     should "update any new posts that were added" do
       @p1.reload
-      assert_equal("pool:#{@pool.id}", @p1.pool_string)
+      assert_equal("pool:#{@pool.id} pool:series", @p1.pool_string)
     end
   end
 
diff --git a/test/unit/post_test.rb b/test/unit/post_test.rb
index 5f73a1c44..bfe80856a 100644
--- a/test/unit/post_test.rb
+++ b/test/unit/post_test.rb
@@ -33,18 +33,23 @@ class PostTest < ActiveSupport::TestCase
         end
       end
 
-      should "remove the post from all pools" do
-        pool = FactoryGirl.create(:pool)
-        pool.add!(@post)
-        @post.expunge!
-        pool.reload
-        assert_equal("", pool.post_ids)
-      end
+      context "that belongs to a pool" do
+        setup do
+          @pool = FactoryGirl.create(:pool)
+          @pool.add!(@post)
+          @post.reload
+          @post.expunge!
+        end
 
-      should "destroy the record" do
-        @post.expunge!
-        assert_equal([], @post.errors.full_messages)
-        assert_equal(0, Post.where("id = ?", @post.id).count)
+        should "remove the post from all pools" do
+          @pool.reload
+          assert_equal("", @pool.post_ids)
+        end
+
+        should "destroy the record" do
+          assert_equal([], @post.errors.full_messages)
+          assert_equal(0, Post.where("id = ?", @post.id).count)
+        end
       end
     end
 
@@ -425,6 +430,18 @@ class PostTest < ActiveSupport::TestCase
         @post = FactoryGirl.create(:post)
       end
 
+      context "with a banned artist" do
+        setup do
+          @artist = FactoryGirl.create(:artist)
+          @artist.ban!
+          @post = FactoryGirl.create(:post, :tag_string => @artist.name)
+        end
+
+        should "ban the post" do
+          assert_equal(true, @post.is_banned?)
+        end
+      end
+
       context "with an artist tag that is then changed to copyright" do
         setup do
           CurrentUser.user = FactoryGirl.create(:builder_user)
diff --git a/test/unit/tag_alias_test.rb b/test/unit/tag_alias_test.rb
index 9a6f43649..6d945dbd3 100644
--- a/test/unit/tag_alias_test.rb
+++ b/test/unit/tag_alias_test.rb
@@ -99,6 +99,19 @@ class TagAliasTest < ActiveSupport::TestCase
         @alias = FactoryGirl.create(:tag_alias, :antecedent_name => "aaa", :consequent_name => "bbb", :forum_topic => @topic)
       end
 
+      context "and conflicting wiki pages" do
+        setup do
+          @wiki1 = FactoryGirl.create(:wiki_page, :title => "aaa")
+          @wiki2 = FactoryGirl.create(:wiki_page, :title => "bbb")
+        end
+
+        should "update the topic when processed" do
+          assert_difference("ForumPost.count") do
+            @alias.rename_wiki_and_artist
+          end
+        end
+      end
+
       should "update the topic when processed" do
         assert_difference("ForumPost.count") do
           @alias.process!
diff --git a/test/unit/upload_test.rb b/test/unit/upload_test.rb
index f83f13998..d6dd3dc47 100644
--- a/test/unit/upload_test.rb
+++ b/test/unit/upload_test.rb
@@ -255,13 +255,14 @@ class UploadTest < ActiveSupport::TestCase
       VCR.use_cassette("ugoira-converter", :record => :none) do
         assert_difference(["Post.count", "PixivUgoiraFrameData.count"]) do
           @upload.process!
+          assert_equal([], @upload.errors.full_messages)
         end
         post = Post.last
         assert_not_nil(post.pixiv_ugoira_frame_data)
         assert_equal("0d94800c4b520bf3d8adda08f95d31e2", post.md5)
         assert_equal(60, post.image_width)
         assert_equal(60, post.image_height)
-        assert_equal("http://i1.pixiv.net/img-zip-ugoira/img/2014/10/05/23/42/23/46378654_ugoira1920x1080.zip", post.source)
+        assert_equal("http://i3.pixiv.net/img-zip-ugoira/img/2014/10/05/23/42/23/46378654_ugoira1920x1080.zip", post.source)
         assert_operator(File.size(post.large_file_path), :>, 0)
         assert_operator(File.size(post.preview_file_path), :>, 0)            
       end