i18n IndexError exceptions

[dread]

We get this i18n error for the URL ​http://no.ckan.net/authorizationgroup (which runs 1.4.2 with Norwegian translation). I'm not sure why it occurs. Fixing it is low importance though, because this site doesn't use Authorization Group feature

Usually caused by bots. The user does not appear to be logged in.

WebApp Error: <type 'exceptions.IndexError'>: list index out of range
...
Module genshi.filters.i18n:177 in _generate
<<                  msgbuf.append(*previous)
                       previous = None
                   for event in msgbuf.translate(gettext(msgbuf.format())):
                       yield event
                   if previous:
>>  for event in msgbuf.translate(gettext(msgbuf.format())):
Module genshi.filters.i18n:1029 in translate
<<                      )
       
               parts = parse_msg(string)
               parts_counter = {}
               for order, string in parts:
>>  parts = parse_msg(string)
Module genshi.filters.i18n:1143 in parse_msg
<<      if string:
               parts.append((stack[-1], string))
       
           return parts
>>  parts.append((stack[-1], string))
IndexError: list index out of range