2010-10-30 23:51 ERROR    feed          dvd-retail-sweb Unhandled error in plugin regexp: look-behind requires fixed-width pattern
Traceback (most recent call last):
  File "/home/ammin/flexget-autodl/flexget/feed.py", line 336, in __run_event
    method(self)
  File "/home/ammin/flexget-autodl/flexget/plugin.py", line 282, in __call__
    return getattr(self.plugin.instance, self.method_name)(*args, **kwargs)
  File "/home/ammin/flexget-autodl/flexget/plugins/filter_regexp.py", line 84, in on_feed_filter
    r = self.filter(feed, match_method, non_match_method, regexps)
  File "/home/ammin/flexget-autodl/flexget/plugins/filter_regexp.py", line 149, in filter
    field = self.matches(entry, regexp_raw, from_fields)
  File "/home/ammin/flexget-autodl/flexget/plugins/filter_regexp.py", line 109, in matches
    if re.search(regexp, value, re.IGNORECASE | re.UNICODE):
  File "/home/ammin/flexget-autodl/lib/python2.6/re.py", line 142, in search
    return _compile(pattern, flags).search(string)
  File "/home/ammin/flexget-autodl/lib/python2.6/re.py", line 245, in _compile
    raise error, v # invalid expression
error: look-behind requires fixed-width pattern