2 files changed, 12 insertions, 4 deletions
diff --git a/actionpack/lib/action_view/helpers/capture_helper.rb b/actionpack/lib/action_view/helpers/capture_helper.rb
index 9e39536653..b4197479a0 100644
--- a/actionpack/lib/action_view/helpers/capture_helper.rb
+++ b/actionpack/lib/action_view/helpers/capture_helper.rb
@@ -124,7 +124,11 @@ module ActionView
 
       # Use an alternate output buffer for the duration of the block.
       # Defaults to a new empty string.
-      def with_output_buffer(buf = '') #:nodoc:
+      def with_output_buffer(buf = nil) #:nodoc:
+        unless buf
+          buf = ''
+          buf.force_encoding(output_buffer.encoding) if buf.respond_to?(:force_encoding)
+        end
         self.output_buffer, old_buffer = buf, output_buffer
         yield
         output_buffer
@@ -134,9 +138,12 @@ module ActionView
 
       # Add the output buffer to the response body and start a new one.
       def flush_output_buffer #:nodoc:
-        if output_buffer && output_buffer != ''
+        if output_buffer && !output_buffer.empty?
           response.body_parts << output_buffer
-          self.output_buffer = ''
+          new = ''
+          new.force_encoding(output_buffer.encoding) if new.respond_to?(:force_encoding)
+          self.output_buffer = new
+          nil
         end
       end
     end
diff --git a/actionpack/lib/action_view/helpers/form_tag_helper.rb b/actionpack/lib/action_view/helpers/form_tag_helper.rb
index daf38fe3da..c96b1fc8d2 100644
--- a/actionpack/lib/action_view/helpers/form_tag_helper.rb
+++ b/actionpack/lib/action_view/helpers/form_tag_helper.rb
@@ -353,7 +353,8 @@ module ActionView
           disable_with << ";#{options.delete('onclick')}" if options['onclick']
           
           options["onclick"]  = "if (window.hiddenCommit) { window.hiddenCommit.setAttribute('value', this.value); }"
-          options["onclick"] << "else { hiddenCommit = this.cloneNode(false);hiddenCommit.setAttribute('type', 'hidden');this.form.appendChild(hiddenCommit); }"
+          options["onclick"] << "else { hiddenCommit = document.createElement('input');hiddenCommit.type = 'hidden';"
+          options["onclick"] << "hiddenCommit.value = this.value;hiddenCommit.name = this.name;this.form.appendChild(hiddenCommit); }"
           options["onclick"] << "this.setAttribute('originalValue', this.value);this.disabled = true;#{disable_with};"
           options["onclick"] << "result = (this.form.onsubmit ? (this.form.onsubmit() ? this.form.submit() : false) : this.form.submit());"
           options["onclick"] << "if (result == false) { this.value = this.getAttribute('originalValue');this.disabled = false; }return result;"