Bug in Mailman version 2.1.1

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Traceback:

Traceback (most recent call last):
  File "/var/lib/mailman/scripts/driver", line 87, in run_main
    main()
  File "/usr/lib/mailman/Mailman/Cgi/listinfo.py", line 47, in main
    mlist = MailList.MailList(listname, lock=0)
  File "/usr/lib/mailman/Mailman/MailList.py", line 101, in __init__
    self.Load()
  File "/usr/lib/mailman/Mailman/MailList.py", line 573, in Load
    dict, e = self.__load(file)
  File "/usr/lib/mailman/Mailman/MailList.py", line 546, in __load
    dict = loadfunc(fp)
UnpicklingError: invalid load key, ''.

Python information:

Variable Value

sys.version 2.1.3 (#1, Sep 7 2002, 15:29:56) [GCC 2.95.4 20011002 (Debian prerelease)]

sys.executable /usr/bin/python

sys.prefix /usr

sys.exec_prefix /usr

sys.path /usr

sys.platform linux2

Variable	Value
`sys.version`	2.1.3 (#1, Sep 7 2002, 15:29:56) [GCC 2.95.4 20011002 (Debian prerelease)]
`sys.executable`	/usr/bin/python
`sys.prefix`	/usr
`sys.exec_prefix`	/usr
`sys.path`	/usr
`sys.platform`	linux2

Environment variables:

Variable Value

DOCUMENT_ROOT /var/alternc/bureau

SERVER_ADDR 80.67.174.65

HTTP_ACCEPT_ENCODING gzip

SERVER_PORT 80

PATH_TRANSLATED /var/alternc/dns/c/chiffonrouge.org/red-wire

REMOTE_ADDR 38.103.63.16

SERVER_SOFTWARE Apache

UNIQUE_ID SG3@J1BDrkEAABHvVGo

HTTP_ACCEPT_LANGUAGE en-us,en;q=0.5

GATEWAY_INTERFACE CGI/1.1

SERVER_NAME chiffonrouge.org

HTTP_CONNECTION close

HTTP_USER_AGENT CCBot/1.0 (+http://www.commoncrawl.org/bot.html)

HTTP_ACCEPT_CHARSET ISO-8859-1,utf-8;q=0.7,*;q=0.7

HTTP_ACCEPT Accept: application/xhtml+xml,text/html;q=0.9,text/plain;

REQUEST_URI /cgi-bin/mailman/listinfo/red-wire

HTTP_CACHE_CONTROL no-cache

QUERY_STRING

SERVER_PROTOCOL HTTP/1.1

PATH_INFO /red-wire

HTTP_HOST chiffonrouge.org

REQUEST_METHOD GET

SERVER_SIGNATURE

SCRIPT_NAME /cgi-bin/mailman/listinfo

SERVER_ADMIN root@domain35.altern.com

SCRIPT_FILENAME /var/alternc/cgi-bin/mailman/listinfo

PYTHONPATH /var/lib/mailman

HTTP_PRAGMA no-cache

REMOTE_PORT 45615

Variable	Value
`DOCUMENT_ROOT`	/var/alternc/bureau
`SERVER_ADDR`	80.67.174.65
`HTTP_ACCEPT_ENCODING`	gzip
`SERVER_PORT`	80
`PATH_TRANSLATED`	/var/alternc/dns/c/chiffonrouge.org/red-wire
`REMOTE_ADDR`	38.103.63.16
`SERVER_SOFTWARE`	Apache
`UNIQUE_ID`	SG3@J1BDrkEAABHvVGo
`HTTP_ACCEPT_LANGUAGE`	en-us,en;q=0.5
`GATEWAY_INTERFACE`	CGI/1.1
`SERVER_NAME`	chiffonrouge.org
`HTTP_CONNECTION`	close
`HTTP_USER_AGENT`	CCBot/1.0 (+http://www.commoncrawl.org/bot.html)
`HTTP_ACCEPT_CHARSET`	ISO-8859-1,utf-8;q=0.7,*;q=0.7
`HTTP_ACCEPT`	Accept: application/xhtml+xml,text/html;q=0.9,text/plain;
`REQUEST_URI`	/cgi-bin/mailman/listinfo/red-wire
`HTTP_CACHE_CONTROL`	no-cache
`QUERY_STRING`
`SERVER_PROTOCOL`	HTTP/1.1
`PATH_INFO`	/red-wire
`HTTP_HOST`	chiffonrouge.org
`REQUEST_METHOD`	GET
`SERVER_SIGNATURE`
`SCRIPT_NAME`	/cgi-bin/mailman/listinfo
`SERVER_ADMIN`	root@domain35.altern.com
`SCRIPT_FILENAME`	/var/alternc/cgi-bin/mailman/listinfo
`PYTHONPATH`	/var/lib/mailman
`HTTP_PRAGMA`	no-cache
`REMOTE_PORT`	45615