diff --git a/actionpack/lib/action_dispatch/http/request.rb b/actionpack/lib/action_dispatch/http/request.rb
index 99b81c898f60b15f62c201e1aa4fd96a0da3704f..071ff0b63ee3e915946d5bf9976e89adbda532cf 100644
--- a/actionpack/lib/action_dispatch/http/request.rb
+++ b/actionpack/lib/action_dispatch/http/request.rb
@@ -271,7 +271,7 @@ def session_options=(options)
 
     # Override Rack's GET method to support indifferent access
     def GET
-      @env["action_dispatch.request.query_parameters"] ||= (normalize_encode_params(super) || {})
+      @env["action_dispatch.request.query_parameters"] ||= deep_munge((normalize_encode_params(super) || {}))
     rescue TypeError => e
       raise ActionController::BadRequest.new(:query, e)
     end
@@ -279,7 +279,7 @@ def GET
 
     # Override Rack's POST method to support indifferent access
     def POST
-      @env["action_dispatch.request.request_parameters"] ||= (normalize_encode_params(super) || {})
+      @env["action_dispatch.request.request_parameters"] ||= deep_munge((normalize_encode_params(super) || {}))
     rescue TypeError => e
       raise ActionController::BadRequest.new(:request, e)
     end
diff --git a/actionpack/test/dispatch/request/query_string_parsing_test.rb b/actionpack/test/dispatch/request/query_string_parsing_test.rb
index f072a9f717038865a175bdc8c8c8e2da382aeb03..0ad0dbc9580bfa4785a73e66a72e411bb7f21ed5 100644
--- a/actionpack/test/dispatch/request/query_string_parsing_test.rb
+++ b/actionpack/test/dispatch/request/query_string_parsing_test.rb
@@ -11,6 +11,17 @@ def parse
       head :ok
     end
   end
+  class EarlyParse
+    def initialize(app)
+      @app = app
+    end
+
+    def call(env)
+      # Trigger a Rack parse so that env caches the query params
+      Rack::Request.new(env).params
+      @app.call(env)
+    end
+  end
 
   def teardown
     TestController.last_query_parameters = nil
@@ -131,6 +142,10 @@ def assert_parses(expected, actual)
         set.draw do
           get ':action', :to => ::QueryStringParsingTest::TestController
         end
+        @app = self.class.build_app(set) do |middleware|
+          middleware.use(EarlyParse)
+        end
+
 
         get "/parse", actual
         assert_response :ok
diff --git a/actionview/lib/action_view/helpers/number_helper.rb b/actionview/lib/action_view/helpers/number_helper.rb
index 9adc2c1a8fb583d3123ac8abeefc571ed1f2e8d9..13387078a46a6b36278667dcbfa22bd46ecbd3fa 100644
--- a/actionview/lib/action_view/helpers/number_helper.rb
+++ b/actionview/lib/action_view/helpers/number_helper.rb
@@ -394,6 +394,7 @@ def delegate_number_helper_method(method, number, options)
       def escape_unsafe_delimiters_and_separators(options)
         options[:separator] = ERB::Util.html_escape(options[:separator]) if options[:separator] && !options[:separator].html_safe?
         options[:delimiter] = ERB::Util.html_escape(options[:delimiter]) if options[:delimiter] && !options[:delimiter].html_safe?
+        options[:unit]      = ERB::Util.html_escape(options[:unit]) if options[:unit] && !options[:unit].html_safe?
         options
       end
 
diff --git a/actionview/lib/action_view/helpers/text_helper.rb b/actionview/lib/action_view/helpers/text_helper.rb
index b0e4aa3cd378b84fe5f18a7abdc1be2b7dd64ab3..0c956670b6faca713ddf941e35767149ac045df5 100644
--- a/actionview/lib/action_view/helpers/text_helper.rb
+++ b/actionview/lib/action_view/helpers/text_helper.rb
@@ -268,7 +268,7 @@ def simple_format(text, html_options = {}, options = {})
           content_tag(wrapper_tag, nil, html_options)
         else
           paragraphs.map! { |paragraph|
-            content_tag(wrapper_tag, paragraph, html_options, false)
+            content_tag(wrapper_tag, raw(paragraph), html_options, false)
           }.join("\n\n").html_safe
         end
       end
diff --git a/actionview/lib/action_view/helpers/translation_helper.rb b/actionview/lib/action_view/helpers/translation_helper.rb
index ad8eb47f1fb8ee925bf940330966a7a90f9aef69..a1a2bebb6efa09145073f33e2c10d568836bf51d 100644
--- a/actionview/lib/action_view/helpers/translation_helper.rb
+++ b/actionview/lib/action_view/helpers/translation_helper.rb
@@ -1,24 +1,14 @@
 require 'action_view/helpers/tag_helper'
 require 'i18n/exceptions'
 
-module I18n
-  class ExceptionHandler
-    include Module.new {
-      def call(exception, locale, key, options)
-        exception.is_a?(MissingTranslation) && options[:rescue_format] == :html ? super.html_safe : super
-      end
-    }
-  end
-end
-
 module ActionView
   # = Action View Translation Helpers
   module Helpers
     module TranslationHelper
       # Delegates to <tt>I18n#translate</tt> but also performs three additional functions.
       #
-      # First, it'll pass the <tt>rescue_format: :html</tt> option to I18n so that any
-      # thrown +MissingTranslation+ messages will be turned into inline spans that
+      # First, it will ensure that any thrown +MissingTranslation+ messages will be turned 
+      # into inline spans that:
       #
       #   * have a "translation-missing" class set,
       #   * contain the missing key as a title attribute and
@@ -44,8 +34,11 @@ module TranslationHelper
       # naming convention helps to identify translations that include HTML tags so that
       # you know what kind of output to expect when you call translate in a template.
       def translate(key, options = {})
-        options.merge!(:rescue_format => :html) unless options.key?(:rescue_format)
         options[:default] = wrap_translate_defaults(options[:default]) if options[:default]
+
+        # If the user has specified rescue_format then pass it all through, otherwise use
+        # raise and do the work ourselves
+        options[:raise] = true unless options.key?(:raise) || options.key?(:rescue_format)
         if html_safe_translation_key?(key)
           html_safe_options = options.dup
           options.except(*I18n::RESERVED_KEYS).each do |name, value|
@@ -59,6 +52,9 @@ def translate(key, options = {})
         else
           I18n.translate(scope_key_by_partial(key), options)
         end
+      rescue I18n::MissingTranslationData => e
+        keys = I18n.normalize_keys(e.locale, e.key, e.options[:scope])
+        content_tag('span', keys.last.to_s.titleize, :class => 'translation_missing', :title => "translation missing: #{keys.join('.')}")
       end
       alias :t :translate
 
diff --git a/actionview/lib/action_view/lookup_context.rb b/actionview/lib/action_view/lookup_context.rb
index f9d5b97fe3655d52c6dec8c5ed64509043e2ba3b..c6ff683827d43ea3a296cd8f4bbf17e37312db62 100644
--- a/actionview/lib/action_view/lookup_context.rb
+++ b/actionview/lib/action_view/lookup_context.rb
@@ -62,6 +62,13 @@ class DetailsKey #:nodoc:
       @details_keys = ThreadSafe::Cache.new
 
       def self.get(details)
+        if details[:formats]
+          details = details.dup
+          syms    = Set.new Mime::SET.symbols
+          details[:formats] = details[:formats].select { |v|
+            syms.include? v
+          }
+        end
         @details_keys[details] ||= new
       end
 
diff --git a/actionview/test/template/number_helper_test.rb b/actionview/test/template/number_helper_test.rb
index 6e640889d2b387e04795072b2e37bcbfec40ae4d..be336ea3fb691af30f14ef0c4565ad9f76ef75be 100644
--- a/actionview/test/template/number_helper_test.rb
+++ b/actionview/test/template/number_helper_test.rb
@@ -14,7 +14,8 @@ def test_number_to_currency
     assert_equal nil, number_to_currency(nil)
     assert_equal "$1,234,567,890.50", number_to_currency(1234567890.50)
     assert_equal "$1,234,567,892", number_to_currency(1234567891.50, precision: 0)
-    assert_equal "1,234,567,890.50 - K&#269;", number_to_currency("-1234567890.50", unit: "K&#269;", format: "%n %u", negative_format: "%n - %u")
+    assert_equal "1,234,567,890.50 - K&#269;", number_to_currency("-1234567890.50", unit: raw("K&#269;"), format: "%n %u", negative_format: "%n - %u")
+    assert_equal "&amp;pound;1,234,567,890.50", number_to_currency("1234567890.50", unit: "&pound;")
   end
 
   def test_number_to_percentage
diff --git a/actionview/test/template/translation_helper_test.rb b/actionview/test/template/translation_helper_test.rb
index d496dbb35eba00bddb1d4d34f069b4df744e420a..0dfe47f5f4248a25105cca00aeea7b23732a9c53 100644
--- a/actionview/test/template/translation_helper_test.rb
+++ b/actionview/test/template/translation_helper_test.rb
@@ -31,7 +31,7 @@ def setup
   end
 
   def test_delegates_to_i18n_setting_the_rescue_format_option_to_html
-    I18n.expects(:translate).with(:foo, :locale => 'en', :rescue_format => :html).returns("")
+    I18n.expects(:translate).with(:foo, :locale => 'en', :raise=>true).returns("")
     translate :foo, :locale => 'en'
   end