Index: app/models/mailer.rb
===================================================================
--- app/models/mailer.rb	(revision 10796)
+++ app/models/mailer.rb	(working copy)
@@ -48,6 +48,31 @@
       :subject => "[#{issue.project.name} - #{issue.tracker.name} ##{issue.id}] (#{issue.status.name}) #{issue.subject}"
   end
 
+  # Builds a Mail::Message object used to email recipients of the issues addressed in the chagneset.
+  #
+  # Example:
+  #   issue_changeset(changeset, issue) => Mail::Message object
+  #   Mailer.issue_changeset(changeset, issue).deliver => sends an email to issue recipients
+  def issue_changeset(changeset, issue)
+    redmine_headers 'Project' => issue.project.identifier,
+                    'Issue-Id' => issue.id,
+                    'Issue-Author' => issue.author.login
+    redmine_headers 'Issue-Assignee' => issue.assigned_to.login if issue.assigned_to
+    message_id issue
+    references issue
+    @author = changeset.user
+    recipients = issue.recipients
+    # Watchers in cc
+    cc = issue.watcher_recipients - recipients
+    s = "[#{issue.project.name} - #{issue.tracker.name} ##{issue.id}] "
+    s << issue.subject
+    s << " - Commit By #{changeset.user} [R#{changeset.revision}]"
+    @issue = issue
+    @changeset = changeset
+    @issue_url = url_for(:controller => 'issues', :action => 'show', :id => issue)
+    mail(:to => recipients, :cc => cc, :subject => s)
+  end
+  
   # Builds a Mail::Message object used to email recipients of the edited issue.
   #
   # Example:
Index: app/models/changeset.rb
===================================================================
--- app/models/changeset.rb	(revision 10796)
+++ app/models/changeset.rb	(working copy)
@@ -142,6 +142,9 @@
 
     referenced_issues.uniq!
     self.issues = referenced_issues unless referenced_issues.empty?
+    self.issues.each do |issue|
+      Mailer.issue_changeset(self, issue).deliver if !referenced_issues.empty? && Setting.notified_events.include?('issue_updated')
+    end
   end
 
   def short_comments
Index: app/views/mailer/issue_changeset.html.erb
===================================================================
--- app/views/mailer/issue_changeset.html.erb	(revision 0)
+++ app/views/mailer/issue_changeset.html.erb	(revision 0)
@@ -0,0 +1,6 @@
+<%= l(:text_issue_updated, :id => "##{@issue.id}", :author => h(@author)) %>
+<hr />
+<%= textilizable(@changeset, :comments, :only_path => false) %>
+
+<hr />
+<%= render :partial => 'issue', :formats => [:html], :locals => { :issue => @issue, :issue_url => @issue_url } %>
Index: app/views/mailer/issue_changeset.text.erb
===================================================================
--- app/views/mailer/issue_changeset.text.erb	(revision 0)
+++ app/views/mailer/issue_changeset.text.erb	(revision 0)
@@ -0,0 +1,6 @@
+<%= l(:text_issue_updated, :id => "##{@issue.id}", :author => @author) %>
+----------------------------------------
+<%= textilizable(@changeset.comments) %>
+
+----------------------------------------
+<%= render :partial => 'issue', :formats => [:text], :locals => { :issue => @issue, :issue_url => @issue_url } %>