diff --git a/django/utils/feedgenerator.py b/django/utils/feedgenerator.py
index c9445f932f..7e5a4a0ae3 100644
--- a/django/utils/feedgenerator.py
+++ b/django/utils/feedgenerator.py
@@ -19,8 +19,8 @@ For definitions of the different versions of RSS, see:
 http://diveintomark.org/archives/2004/02/04/incompatible-rss
 """
 
-import re
 import datetime
+import urlparse
 from django.utils.xmlutils import SimplerXMLGenerator
 from django.utils.encoding import force_unicode, iri_to_uri
 
@@ -46,12 +46,16 @@ def rfc3339_date(date):
         return date.strftime('%Y-%m-%dT%H:%M:%SZ')
 
 def get_tag_uri(url, date):
-    "Creates a TagURI. See http://diveintomark.org/archives/2004/05/28/howto-atom-id"
-    tag = re.sub('^http://', '', url)
+    """
+    Creates a TagURI.
+
+    See http://diveintomark.org/archives/2004/05/28/howto-atom-id
+    """
+    url_split = urlparse.urlparse(url)
+    d = ''
     if date is not None:
-        tag = re.sub('/', ',%s:/' % date.strftime('%Y-%m-%d'), tag, 1)
-    tag = re.sub('#', '/', tag)
-    return u'tag:' + tag
+        d = ',%s' % date.strftime('%Y-%m-%d')
+    return u'tag:%s%s:%s/%s' % (url_split.hostname, d, url_split.path, url_split.fragment)
 
 class SyndicationFeed(object):
     "Base class for all syndication feeds. Subclasses should provide write()"
diff --git a/tests/regressiontests/utils/feedgenerator.py b/tests/regressiontests/utils/feedgenerator.py
new file mode 100644
index 0000000000..5a10de2d1b
--- /dev/null
+++ b/tests/regressiontests/utils/feedgenerator.py
@@ -0,0 +1,63 @@
+import datetime
+from unittest import TestCase
+
+from django.utils import feedgenerator, tzinfo
+
+class FeedgeneratorTest(TestCase):
+    """
+    Tests for the low-level syndication feed framework.
+    """
+
+    def test_get_tag_uri(self):
+        """
+        Test get_tag_uri() correctly generates TagURIs.
+        """
+        self.assertEqual(
+            feedgenerator.get_tag_uri('http://example.org/foo/bar#headline', datetime.date(2004, 10, 25)),
+            u'tag:example.org,2004-10-25:/foo/bar/headline')
+
+    def test_get_tag_uri_with_port(self):
+        """
+        Test that get_tag_uri() correctly generates TagURIs from URLs with port
+        numbers.
+        """
+        self.assertEqual(
+            feedgenerator.get_tag_uri('http://www.example.org:8000/2008/11/14/django#headline', datetime.datetime(2008, 11, 14, 13, 37, 0)),
+            u'tag:www.example.org,2008-11-14:/2008/11/14/django/headline')
+
+    def test_rfc2822_date(self):
+        """
+        Test rfc2822_date() correctly formats datetime objects.
+        """
+        self.assertEqual(
+            feedgenerator.rfc2822_date(datetime.datetime(2008, 11, 14, 13, 37, 0)),
+            "Fri, 14 Nov 2008 13:37:00 -0000"
+        )
+
+    def test_rfc2822_date_with_timezone(self):
+        """
+        Test rfc2822_date() correctly formats datetime objects with tzinfo.
+        """
+        self.assertEqual(
+            feedgenerator.rfc2822_date(datetime.datetime(2008, 11, 14, 13, 37, 0, tzinfo=tzinfo.FixedOffset(datetime.timedelta(minutes=60)))),
+            "Fri, 14 Nov 2008 13:37:00 +0100"
+        )
+
+    def test_rfc3339_date(self):
+        """
+        Test rfc3339_date() correctly formats datetime objects.
+        """
+        self.assertEqual(
+            feedgenerator.rfc3339_date(datetime.datetime(2008, 11, 14, 13, 37, 0)),
+            "2008-11-14T13:37:00Z"
+        )
+
+    def test_rfc3339_date_with_timezone(self):
+        """
+        Test rfc3339_date() correctly formats datetime objects with tzinfo.
+        """
+        self.assertEqual(
+            feedgenerator.rfc3339_date(datetime.datetime(2008, 11, 14, 13, 37, 0, tzinfo=tzinfo.FixedOffset(datetime.timedelta(minutes=120)))),
+            "2008-11-14T13:37:00+02:00"
+        )
+
diff --git a/tests/regressiontests/utils/tests.py b/tests/regressiontests/utils/tests.py
index d51fa13fd8..aaa2944511 100644
--- a/tests/regressiontests/utils/tests.py
+++ b/tests/regressiontests/utils/tests.py
@@ -29,6 +29,7 @@ __test__ = {
 }
 
 from dateformat import *
+from feedgenerator import *
 
 class TestUtilsHtml(TestCase):