diff --git a/app/assets/javascripts/discourse/lib/autocomplete.js.es6 b/app/assets/javascripts/discourse/lib/autocomplete.js.es6
index 0fb1ed3a3..6848c8b9c 100644
--- a/app/assets/javascripts/discourse/lib/autocomplete.js.es6
+++ b/app/assets/javascripts/discourse/lib/autocomplete.js.es6
@@ -58,7 +58,13 @@ export default function(options) {
   }
 
   if (this.length !== 1) {
-    alert("only supporting one matcher at the moment");
+    if (window.console) {
+      window.console.log("WARNING: passed multiple elements to $.autocomplete, skipping.");
+      if (window.Error) {
+        window.console.log((new window.Error()).stack);
+      }
+    }
+    return this;
   }
 
   var disabled = options && options.disabled;
diff --git a/app/assets/stylesheets/common/components/banner.css.scss b/app/assets/stylesheets/common/components/banner.css.scss
index 3c800e9b1..fbaff6d0b 100644
--- a/app/assets/stylesheets/common/components/banner.css.scss
+++ b/app/assets/stylesheets/common/components/banner.css.scss
@@ -16,9 +16,10 @@
   }
 
   .close {
-    font-size: 1.786em !important;
-    margin-top: -10px !important;
-    color: darken($tertiary, 45%);
+    font-size: 1.786em;
+    margin-top: -10px;
+    color: scale-color($tertiary, $lightness: 70%);
+    padding-left: 5px;
   }
 
   .meta {
diff --git a/app/mailers/user_notifications.rb b/app/mailers/user_notifications.rb
index 542744d39..018fba102 100644
--- a/app/mailers/user_notifications.rb
+++ b/app/mailers/user_notifications.rb
@@ -236,25 +236,20 @@ class UserNotifications < ActionMailer::Base
       user_name = name unless name.blank?
     end
 
-    title = notification_data[:topic_title]
     allow_reply_by_email = opts[:allow_reply_by_email] unless user.suspended?
-    use_site_subject = opts[:use_site_subject]
-    add_re_to_subject = opts[:add_re_to_subject]
-    show_category_in_subject = opts[:show_category_in_subject]
-    use_template_html = opts[:use_template_html]
     original_username = notification_data[:original_username] || notification_data[:display_username]
 
     send_notification_email(
-      title: title,
+      title: notification_data[:topic_title],
       post: post,
       username: original_username,
       from_alias: user_name,
       allow_reply_by_email: allow_reply_by_email,
-      use_site_subject: use_site_subject,
-      add_re_to_subject: add_re_to_subject,
-      show_category_in_subject: show_category_in_subject,
+      use_site_subject: opts[:use_site_subject],
+      add_re_to_subject: opts[:add_re_to_subject],
+      show_category_in_subject: opts[:show_category_in_subject],
       notification_type: notification_type,
-      use_template_html: use_template_html,
+      use_template_html: opts[:use_template_html],
       user: user
     )
   end
diff --git a/app/models/notification.rb b/app/models/notification.rb
index d21875c8b..2f8090abc 100644
--- a/app/models/notification.rb
+++ b/app/models/notification.rb
@@ -98,8 +98,8 @@ class Notification < ActiveRecord::Base
   # Be wary of calling this frequently. O(n) JSON parsing can suck.
   def data_hash
     @data_hash ||= begin
-
       return nil if data.blank?
+
       parsed = JSON.parse(data)
       return nil if parsed.blank?
 
diff --git a/app/services/post_alerter.rb b/app/services/post_alerter.rb
index 5ee0ad8e1..29b9ec1aa 100644
--- a/app/services/post_alerter.rb
+++ b/app/services/post_alerter.rb
@@ -259,8 +259,16 @@ class PostAlerter
 
     UserActionObserver.log_notification(original_post, user, type, opts[:acting_user_id])
 
+    topic_title = post.topic.title
+    # when sending a private message email, keep the original title
+    if post.topic.private_message? && modifications = post.revisions.map(&:modifications).to_a
+      if first_title_modification = modifications.first { |m| m.has_key?("title") }
+        topic_title = first_title_modification["title"][0]
+      end
+    end
+
     notification_data = {
-      topic_title: post.topic.title,
+      topic_title: topic_title,
       original_post_id: original_post.id,
       original_post_type: original_post.post_type,
       original_username: original_username,
diff --git a/config/locales/server.en.yml b/config/locales/server.en.yml
index fe8476363..f3b3e1391 100644
--- a/config/locales/server.en.yml
+++ b/config/locales/server.en.yml
@@ -1490,7 +1490,7 @@ en:
 
       - If you run your own mail server, check to make sure the IPs of your mail server are [not on any email blacklists][4]. Also verify that it is definitely sending a fully-qualified hostname that resolves in DNS in its HELO message. If not, this will cause your email to be rejected by many mail services.
 
-      - Send a test email to [mail-tester.com][mt] to verify that everything is working correctly. 
+      - Send a test email to [mail-tester.com][mt] to verify that everything is working correctly.
 
       (The *easy* way is to create a free account on [Mandrill][md] or [Mailgun][mg] or [Mailjet][mj], which have free generous free mailing plans and will be fine for small communities. You'll still need to set up the SPF and DKIM records in your DNS, though!)
 
@@ -1515,13 +1515,11 @@ en:
   new_version_mailer:
     subject_template: "[%{site_name}] New Discourse version, update available"
     text_body_template: |
-      A new version of [Discourse](http://www.discourse.org) is available.
+      Hooray, a new version of [Discourse](http://www.discourse.org) is available! :)
 
       Your version: %{installed_version}
       New version: **%{new_version}**
 
-      You may want to:
-
       - See what's new in the [GitHub changelog](https://github.com/discourse/discourse/commits/master).
 
       - Upgrade from your browser at [%{base_url}/admin/upgrade](%{base_url}/admin/upgrade).
@@ -1531,13 +1529,11 @@ en:
   new_version_mailer_with_notes:
     subject_template: "[%{site_name}] update available"
     text_body_template: |
-      A new version of [Discourse](http://www.discourse.org) is available.
+      Hooray, a new version of [Discourse](http://www.discourse.org) is available! :)
 
       Your version: %{installed_version}
       New version: **%{new_version}**
 
-      You may want to:
-
       - See what's new in the [GitHub changelog](https://github.com/discourse/discourse/commits/master).
 
       - Upgrade from your browser at [%{base_url}/admin/upgrade](%{base_url}/admin/upgrade).
diff --git a/lib/freedom_patches/translate_accelerator.rb b/lib/freedom_patches/translate_accelerator.rb
index 8b131d324..517357d59 100644
--- a/lib/freedom_patches/translate_accelerator.rb
+++ b/lib/freedom_patches/translate_accelerator.rb
@@ -28,6 +28,7 @@ module I18n
       @overrides_by_site = {}
 
       reload_no_cache!
+      ensure_all_loaded!
     end
 
     LOAD_MUTEX = Mutex.new
@@ -105,8 +106,7 @@ module I18n
 
       by_site = @overrides_by_site[site]
 
-      by_locale = nil
-      unless by_site
+      unless by_site && by_site.has_key?(locale)
         by_site = @overrides_by_site[site] = {}
 
         # Load overrides
diff --git a/lib/i18n/backend/discourse_i18n.rb b/lib/i18n/backend/discourse_i18n.rb
index c4bccbf12..8b2ea2375 100644
--- a/lib/i18n/backend/discourse_i18n.rb
+++ b/lib/i18n/backend/discourse_i18n.rb
@@ -43,7 +43,13 @@ module I18n
       end
 
       def search(locale, query)
-        find_results(/#{query}/i, {}, translations[locale])
+        results = {}
+
+        fallbacks(locale).each do |fallback|
+          find_results(/#{query}/i, results, translations[fallback])
+        end
+
+        results
       end
 
       protected
@@ -54,7 +60,9 @@ module I18n
             k = k_sym.to_s
             key_path = path ? "#{path}.#{k}" : k
             if v.is_a?(String)
-              results[key_path] = v if key_path =~ regexp || v =~ regexp
+              unless results.has_key?(key_path)
+                results[key_path] = v if key_path =~ regexp || v =~ regexp
+              end
             elsif v.is_a?(Hash)
               find_results(regexp, results, v, key_path)
             end
diff --git a/spec/components/discourse_i18n_spec.rb b/spec/components/discourse_i18n_spec.rb
index 40dbf4a2e..f41b9caaf 100644
--- a/spec/components/discourse_i18n_spec.rb
+++ b/spec/components/discourse_i18n_spec.rb
@@ -15,6 +15,7 @@ describe I18n::Backend::DiscourseI18n do
   end
 
   after do
+    I18n.locale = :en
     I18n.reload!
   end
 
@@ -40,6 +41,11 @@ describe I18n::Backend::DiscourseI18n do
     expect(results['items.other']).to eq('%{count} items')
   end
 
+  it 'uses fallback locales for searching' do
+    expect(backend.search(:de, 'bar')).to eq({'bar' => 'Bar in :de'})
+    expect(backend.search(:de, 'foo')).to eq({'foo' => 'Foo in :en'})
+  end
+
   describe '#exists?' do
     it 'returns true when a key is given that exists' do
       expect(backend.exists?(:de, :bar)).to eq(true)
@@ -73,15 +79,23 @@ describe I18n::Backend::DiscourseI18n do
   end
 
   describe 'with overrides' do
-    it 'returns the overriden key' do
+    it 'returns the overridden key' do
       TranslationOverride.upsert!('en', 'foo', 'Overwritten foo')
       expect(I18n.translate('foo')).to eq('Overwritten foo')
 
       TranslationOverride.upsert!('en', 'foo', 'new value')
-      I18n.reload!
       expect(I18n.translate('foo')).to eq('new value')
     end
 
+    it 'returns the overridden key after switching the locale' do
+      TranslationOverride.upsert!('en', 'foo', 'Overwritten foo in EN')
+      TranslationOverride.upsert!('de', 'foo', 'Overwritten foo in DE')
+
+      expect(I18n.translate('foo')).to eq('Overwritten foo in EN')
+      I18n.locale = :de
+      expect(I18n.translate('foo')).to eq('Overwritten foo in DE')
+    end
+
     it "can be searched" do
       TranslationOverride.upsert!('en', 'wat', 'Overwritten value')
       expect(I18n.search('wat', backend: backend)).to eq({'wat' => 'Overwritten value'})
diff --git a/spec/services/post_alerter_spec.rb b/spec/services/post_alerter_spec.rb
index 882e680dc..10f4c10b0 100644
--- a/spec/services/post_alerter_spec.rb
+++ b/spec/services/post_alerter_spec.rb
@@ -150,4 +150,26 @@ describe PostAlerter do
     end
 
   end
+
+
+  describe ".create_notification" do
+
+    it "keeps the original title for PMs" do
+      user = Fabricate(:user)
+      topic = Fabricate(:private_message_topic, user: user, created_at: 1.hour.ago)
+      post = Fabricate(:post, topic: topic, created_at: 1.hour.ago)
+
+      original_title = topic.title
+
+      post.revise(user, { title: "This is the revised title" }, revised_at: Time.now)
+
+      expect {
+        PostAlerter.new.create_notification(user, Notification.types[:private_message], post)
+      }.to change { user.notifications.count }
+
+      expect(user.notifications.last.data_hash["topic_title"]).to eq(original_title)
+    end
+
+  end
+
 end