Seems you found the same bug I reported a few days ago. At which Jim Tittsler responded the following:

This is a known bug in 2.1.5. It should be fixed in CVS, or apply this: http://sourceforge.net/tracker/index.php?func=detail&aid=1045909&group_id=103&atid=300103--Jim Tittsler http://www.OnJapan.net/ GPG: 0x01159DB6Python Starship http://Starship.Python.net/Ringo MUG Tokyo http://www.ringo.net/rss.html---Apply the patch, it works! :)bye,Chris----- Original Message -----From: "Carson Gaspar" carson@taltos.orgTo: mailman-developers@python.orgSent: Sunday, November 21, 2004 9:19 PMSubject: [Mailman-Developers] Bug when canceling invites...>> If the invited person uses the link included in an invite and tries tocancel the invitation themselves, this happens....>> Bug in Mailman version 2.1.5>> We're sorry, we hit a bug!>> If you would like to help us identify the problem, please email a copy of> this page to the webmaster for this site with a description of what> happened. Thanks!>> Traceback:>>> Traceback (most recent call last):> File "/Tools/SunOS_5.9_i86pc/mailman-2.1.5/scripts/driver", line 87, in> run_main> main()> File "/Tools/SunOS_5.9_i86pc/mailman-2.1.5/Mailman/Cgi/confirm.py", line> 114, in main> subscription_cancel(mlist, doc, cookie)> File "/Tools/SunOS_5.9_i86pc/mailman-2.1.5/Mailman/Cgi/confirm.py", line> 312, in subscription_cancel> userdesc = mlist.pend_confirm(cookie)[1]> File "/Tools/SunOS_5.9_i86pc/mailman-2.1.5/Mailman/Pending.py", line 141,> in pend_confirm> assert self.Locked()> AssertionError>>>>> Python information:>> Variable> Value>> sys.version> 2.3.4 (#1, Oct 5 2004, 07:57:49) [C]>> _______________________________________________> Mailman-Developers mailing list> Mailman-Developers@python.org> http://mail.python.org/mailman/listinfo/mailman-developers> Unsubscribe:http://mail.python.org/mailman/options/mailman-developers/chris%40scorpion.nl>>

VAEZ(daneshjooye sharif) wrote:

Carson Gaspar carson@taltos.org wrote: If the invited person uses the link included in an invite and tries to cancel the invitation themselves, this happens....

Bug in Mailman version 2.1.5

We're sorry, we hit a bug!

This is a known problem with version 2.1.5. It has been fixed in the version currently in CVS (and being alpha tested).

Alternatively, you can get a patch to fix just this problem from the SourceForge patch tracker: http://sourceforge.net/tracker/index.php?func=detail&aid=1045909&group_id=103&atid=300103

Thanks for the report.