diff --git a/app/controllers/remote_unfollows.rb b/app/controllers/remote_unfollows_controller.rb
similarity index 100%
rename from app/controllers/remote_unfollows.rb
rename to app/controllers/remote_unfollows_controller.rb
diff --git a/app/javascript/styles/mastodon/components.scss b/app/javascript/styles/mastodon/components.scss
index 147cc653b..6905eaa1e 100644
--- a/app/javascript/styles/mastodon/components.scss
+++ b/app/javascript/styles/mastodon/components.scss
@@ -302,12 +302,10 @@
     height: 0;
     transform-origin: bottom;
     opacity: 0.0;
-    transition: all 0.4s ease;
 
     &.spoiler-input--visible {
       height: 47px;
       opacity: 1.0;
-      transition: all 0.4s ease;
     }
   }
 
@@ -568,6 +566,10 @@
   }
 }
 
+.no-reduce-motion .spoiler-input {
+  transition: height 0.4s ease, opacity 0.4s ease;
+}
+
 .emojione {
   font-size: inherit;
   vertical-align: middle;
diff --git a/app/models/concerns/attachmentable.rb b/app/models/concerns/attachmentable.rb
index db63c3eca..44bdfa39a 100644
--- a/app/models/concerns/attachmentable.rb
+++ b/app/models/concerns/attachmentable.rb
@@ -42,8 +42,9 @@ module Attachmentable
     extensions_for_mime_type = mime_type.empty? ? [] : mime_type.first.extensions
     original_extension       = Paperclip::Interpolations.extension(attachment, :original)
     proper_extension         = extensions_for_mime_type.first.to_s
-    proper_extension         = 'jpeg' if proper_extension == 'jpe'
+    extension                = extensions_for_mime_type.include?(original_extension) ? original_extension : proper_extension
+    extension                = 'jpeg' if extension == 'jpe'
 
-    extensions_for_mime_type.include?(original_extension) ? original_extension : proper_extension
+    extension
   end
 end
diff --git a/db/migrate/20180514130000_improve_index_on_statuses_for_api_v1_accounts_account_id_statuses.rb b/db/migrate/20180514130000_improve_index_on_statuses_for_api_v1_accounts_account_id_statuses.rb
index 2573bdf94..b29e62803 100644
--- a/db/migrate/20180514130000_improve_index_on_statuses_for_api_v1_accounts_account_id_statuses.rb
+++ b/db/migrate/20180514130000_improve_index_on_statuses_for_api_v1_accounts_account_id_statuses.rb
@@ -4,8 +4,9 @@ class ImproveIndexOnStatusesForApiV1AccountsAccountIdStatuses < ActiveRecord::Mi
   disable_ddl_transaction!
 
   def change
-    add_index :statuses, [:account_id, :id, :visibility], where: 'visibility IN (0, 1, 2)', algorithm: :concurrently
-    add_index :statuses, [:account_id, :id], where: 'visibility = 3', algorithm: :concurrently
-    remove_index :statuses, column: [:account_id, :id, :visibility, :updated_at], order: { id: :desc }, algorithm: :concurrently, name: :index_statuses_20180106
+  #  These changes ware reverted by migration 20180514140000.
+  #  add_index :statuses, [:account_id, :id, :visibility], where: 'visibility IN (0, 1, 2)', algorithm: :concurrently
+  #  add_index :statuses, [:account_id, :id], where: 'visibility = 3', algorithm: :concurrently
+  #  remove_index :statuses, column: [:account_id, :id, :visibility, :updated_at], order: { id: :desc }, algorithm: :concurrently, name: :index_statuses_20180106
   end
 end
diff --git a/db/migrate/20180514140000_revert_index_change_on_statuses_for_api_v1_accounts_account_id_statuses.rb b/db/migrate/20180514140000_revert_index_change_on_statuses_for_api_v1_accounts_account_id_statuses.rb
index b6b9f96ae..4a8761fec 100644
--- a/db/migrate/20180514140000_revert_index_change_on_statuses_for_api_v1_accounts_account_id_statuses.rb
+++ b/db/migrate/20180514140000_revert_index_change_on_statuses_for_api_v1_accounts_account_id_statuses.rb
@@ -5,10 +5,11 @@ class RevertIndexChangeOnStatusesForApiV1AccountsAccountIdStatuses < ActiveRecor
 
   def change
     safety_assured do
-      add_index :statuses, [:account_id, :id, :visibility, :updated_at], order: { id: :desc }, algorithm: :concurrently, name: :index_statuses_20180106
+      add_index :statuses, [:account_id, :id, :visibility, :updated_at], order: { id: :desc }, algorithm: :concurrently, name: :index_statuses_20180106 unless index_exists?(:statuses, name: "index_statuses_20180106")
     end
 
-    remove_index :statuses, column: [:account_id, :id, :visibility], where: 'visibility IN (0, 1, 2)', algorithm: :concurrently
-    remove_index :statuses, column: [:account_id, :id], where: 'visibility = 3', algorithm: :concurrently
+    # These index may not exists (see migration 20180514130000)
+    remove_index :statuses, column: [:account_id, :id, :visibility], where: 'visibility IN (0, 1, 2)', algorithm: :concurrently if index_exists?(:statuses, [:account_id, :id, :visibility], where: 'visibility IN (0, 1, 2)')
+    remove_index :statuses, column: [:account_id, :id], where: 'visibility = 3', algorithm: :concurrently if index_exists?(:statuses, ["account_id", "id"], where: "(visibility = 3)")
   end
 end
diff --git a/spec/controllers/remote_unfollows_controller_spec.rb b/spec/controllers/remote_unfollows_controller_spec.rb
new file mode 100644
index 000000000..223ed64af
--- /dev/null
+++ b/spec/controllers/remote_unfollows_controller_spec.rb
@@ -0,0 +1,38 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+describe RemoteUnfollowsController do
+  render_views
+
+  describe '#create' do
+    subject { post :create, params: { acct: acct } }
+
+    let(:current_user) { Fabricate(:user, account: current_account) }
+    let(:current_account) { Fabricate(:account) }
+    let(:remote_account) { Fabricate(:user, email: 'bob@example.com', account: Fabricate(:account, username: 'bob', protocol: :activitypub, domain: 'example.com', inbox_url: 'http://example.com/inbox')).account }
+    before do
+      sign_in current_user
+      current_account.follow!(remote_account)
+      stub_request(:post, 'http://example.com/inbox'){ { status: 200 } }
+    end
+
+    context 'when successfully unfollow remote account' do
+      let(:acct) {"acct:#{ remote_account.username }@#{ remote_account.domain }"}
+
+      it do
+        is_expected.to render_template :success
+        expect(current_account.following?(remote_account)).to be false
+      end
+    end
+
+    context 'when fails to unfollow remote account' do
+      let(:acct) {"acct:#{ remote_account.username + '_test' }@#{ remote_account.domain }"}
+
+      it do
+        is_expected.to render_template :error
+        expect(current_account.following?(remote_account)).to be true
+      end
+    end
+  end
+end