[feeds] Should provide "this doesn't look like a feed" error

2009-05-01 14:46:15,677 DEBUG source.titan: Received message from seed in private: add feed http://rsa.cricinfo.com/ci/content/page/381868.html
 as cricinfo
2009-05-01 14:46:15,692 INFO core.auth: Checking feeds permission for None/2632 (seed): yes
2009-05-01 14:46:25,950 ERROR core.dispatcher: Exception occured in Manage processor of feeds plugin
Traceback (most recent call last):
  File "/home/stefanor/projects/ibid/dc-source/ibid/core.py", line 22, in _process
    processor.process(event)
  File "/home/stefanor/projects/ibid/dc-source/ibid/plugins/__init__.py", line 55, in process
    method(event, *match.groups())
  File "/home/stefanor/projects/ibid/dc-source/ibid/plugins/feeds.py", line 69, in add
    soup = get_html_parse_tree(url)
  File "/home/stefanor/projects/ibid/dc-source/ibid/utils.py", line 155, in get_html_parse_tree
    return BeautifulSoup(data, convertEntities=BeautifulSoup.HTML_ENTITIES)
  File "/usr/lib/pymodules/python2.5/BeautifulSoup.py", line 1499, in __init__
    BeautifulStoneSoup.__init__(self, *args, **kwargs)
  File "/usr/lib/pymodules/python2.5/BeautifulSoup.py", line 1230, in __init__
    self._feed(isHTML=isHTML)
  File "/usr/lib/pymodules/python2.5/BeautifulSoup.py", line 1263, in _feed
    self.builder.feed(markup)
  File "/usr/lib/python2.5/HTMLParser.py", line 108, in feed
    self.goahead(0)
  File "/usr/lib/python2.5/HTMLParser.py", line 150, in goahead
    k = self.parse_endtag(i)
  File "/usr/lib/python2.5/HTMLParser.py", line 314, in parse_endtag
    self.error("bad end tag: %r" % (rawdata[i:j],))
  File "/usr/lib/python2.5/HTMLParser.py", line 115, in error
    raise HTMLParseError(message, self.getpos())
HTMLParseError: bad end tag: u"</scr' + 'ipt>", at line 58, column 70
2009-05-01 14:46:26,070 WARNING plugins.unicode: Found a non-unicode string: exception
2009-05-01 14:46:26,070 DEBUG core.dispatcher: {'message_raw': u'add feed http://rsa.cricinfo.com/ci/content/page/381868.html as cricinfo', 'account': None, 'responses': [{'reply': u"That didn't go down very well. Burp.", 'target': u'seed', 'source': u'titan'}], 'complain': 'exception', 'source': u'titan', 'addressed': True, 'processed': True, 'time': 1241181975.6780961, 'identity': 2632, 'message': u'add feed http://rsa.cric: