TypeError exception when parsing some feed

It happens on http://threeminds.organic.com/feed
See below

>>> import feedparser
>>> feedparser.parse('http://threeminds.organic.com/feed')
Traceback (most recent call last):
  File "<input>", line 1, in <module>
  File "/Library/Python/2.7/site-packages/feedparser.py", line 3997, in parse
    saxparser.parse(source)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/xml/sax/expatreader.py", line 107, in par
se
    xmlreader.IncrementalParser.parse(self, source)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/xml/sax/xmlreader.py", line 123, in parse

    self.feed(buffer)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/xml/sax/expatreader.py", line 207, in fee
d
    self._parser.Parse(data, isFinal)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/xml/sax/expatreader.py", line 349, in end
_element_ns
    self._cont_handler.endElementNS(pair, None)
  File "/Library/Python/2.7/site-packages/feedparser.py", line 1859, in endElementNS
    self.unknown_endtag(localname)
  File "/Library/Python/2.7/site-packages/feedparser.py", line 708, in unknown_endtag
    method()
  File "/Library/Python/2.7/site-packages/feedparser.py", line 1525, in _end_category
    if value and len(tags) and not tags[-1]['term']:
TypeError: string indices must be integers

Original issue reported on code.google.com by analo...@gmail.com on 18 Apr 2012 at 7:20

Reproduce the failure with feedparser.parse('http://threeminds.organic.com/feed') and inspect feedparser.py at _end_category, around line 1525, where the traceback points. Determine why tags contains an unexpected value during parsing; done means this feed parses without the reported TypeError, with regression coverage if the repository provides a suitable test location.