Fix a problem with IE7 headers.

lib/devise.rb

@@ -170,7 +170,7 @@ module Devise
 
   # Which formats should be treated as navigational.
   mattr_accessor :navigational_formats
-  @@navigational_formats = [:html]
+  @@navigational_formats = [:"*/*", :html]
 
   # When set to true, signing out an user signs out all other scopes.
   mattr_accessor :sign_out_all_scopes

lib/generators/templates/devise.rb

@@ -141,9 +141,12 @@ Devise.setup do |config|
   # Lists the formats that should be treated as navigational. Formats like
   # :html, should redirect to the sign in page when the user does not have
   # access, but formats like :xml or :json, should return 401.
+  #
   # If you have any extra navigational formats, like :iphone or :mobile, you
-  # should add them to the navigational formats lists. Default is [:html]
-  # config.navigational_formats = [:html, :iphone]
+  # should add them to the navigational formats lists.
+  #
+  # The :"*/*" format below is required to match Internet Explorer requests.
+  # config.navigational_formats = [:"*/*", :html]
 
   # The default HTTP method used to sign out a resource. Default is :get.
   # config.sign_out_via = :get

test/failure_app_test.rb

@@ -28,6 +28,11 @@ class FailureTest < ActiveSupport::TestCase
       assert_equal 302, @response.first
     end
 
+    test 'return 302 status for wildcard requests' do
+      call_failure 'action_dispatch.request.formats' => nil, 'HTTP_ACCEPT' => '*/*'
+      assert_equal 302, @response.first
+    end
+
     test 'return to the default redirect location' do
       call_failure
       assert_equal 'You need to sign in or sign up before continuing.', @request.flash[:alert]