Index: app/helpers/issues_helper.rb
===================================================================
--- app/helpers/issues_helper.rb	(revision 17839)
+++ app/helpers/issues_helper.rb	(working copy)
@@ -321,8 +321,8 @@
 
   def email_issue_attributes(issue, user, html)
     items = []
-    %w(author status priority assigned_to category fixed_version).each do |attribute|
-      unless issue.disabled_core_fields.include?(attribute+"_id")
+    %w(author status priority assigned_to category fixed_version start_date due_date).each do |attribute|
+      if issue.disabled_core_fields.grep(/^#{attribute}(_id)?$/).empty?
         if html
           items << content_tag('strong', "#{l("field_#{attribute}")}: ") + (issue.send attribute)
         else