Replicating the issue with capitalized data-method value

lib/capybara/spec/views/with_html.erb

@@ -33,6 +33,7 @@
   <a title="twas a fine link" href="/redirect">A link came first</a>
   <a title="a fine link" href="/with_simple_html">A link</a>
   <a title="a fine link with data method" data-method="delete" href="/delete">A link with data-method</a>
+  <a title="a fine link with data method capitalized" data-method="DELETE" href="/delete">A link with data-method capitalized</a>
   <a>No Href</a>
   <a href="">Blank Href</a>
   <a href="#">Blank Anchor</a>

spec/session/rack_test_session_spec.rb

@@ -32,6 +32,12 @@ describe Capybara::Session do
         @session.body.should include('Not deleted')
       end
 
+      it "should use data-method if available even if it's capitalized" do
+        @session.visit "/with_html"
+        @session.click_link "A link with data-method capitalized"
+        @session.body.should include('The requested object was deleted')
+      end
+
       after do
         @session.driver.options[:respect_data_method] = true
       end

xpath

@@ -1 +1 @@
-Subproject commit dbc3356c1daeafd4712c7d7dd9d6a7c91deccab1
+Subproject commit d262efb8db3df8916a53693764e9270076690c0d