Index: utils/feedgenerator.py
===================================================================
--- utils/feedgenerator.py      (revision 4953)
+++ utils/feedgenerator.py      (copie de travail)
@@ -132,6 +132,7 @@
             handler.addQuickElement(u"category", cat)
         if self.feed['feed_copyright'] is not None:
             handler.addQuickElement(u"copyright", self.feed['feed_copyright'])
+        handler.addQuickElement(u"lastBuildDate", rfc2822_date(self.latest_post_date()).decode('ascii'))
         self.write_items(handler)
         self.endChannelElement(handler)
         handler.endElement(u"rss")
@@ -199,6 +200,8 @@
         else:
             handler.startElement(u"feed", {u"xmlns": self.ns})
         handler.addQuickElement(u"title", self.feed['title'])
+        if self.feed['description'] is not None:
+            handler.addQuickElement(u"subtitle", self.feed['description'])
         handler.addQuickElement(u"link", "", {u"rel": u"alternate", u"href": self.feed['link']})
         if self.feed['feed_url'] is not None:
             handler.addQuickElement(u"link", "", {u"rel": u"self", u"href": self.feed['feed_url']})