Invocations of "/etc/init.d/mailman start" spawns multiple instances

Binary package hint: mailman

root@vaio:/tmp# ps -u list
  PID TTY TIME CMD
 8490 ? 00:00:00 mailmanctl
 8491 ? 00:00:00 python
 8492 ? 00:00:00 python
 8493 ? 00:00:00 python
 8494 ? 00:00:00 python
 8495 ? 00:00:00 python
 8496 ? 00:00:00 python
 8497 ? 00:00:00 python
 8498 ? 00:00:00 python
root@vaio:/tmp# /etc/init.d/mailman start
 * Starting Mailman master qrunner mailmanctl [ OK ]
root@vaio:/tmp# ps -u list
  PID TTY TIME CMD
 8490 ? 00:00:00 mailmanctl
 8491 ? 00:00:00 python
 8492 ? 00:00:00 python
 8493 ? 00:00:00 python
 8494 ? 00:00:00 python
 8495 ? 00:00:00 python
 8496 ? 00:00:00 python
 8497 ? 00:00:00 python
 8498 ? 00:00:00 python
 8516 ? 00:00:00 mailmanctl
 8518 ? 00:00:00 python
 8519 ? 00:00:00 python
 8525 ? 00:00:00 python
 8526 ? 00:00:00 python
 8527 ? 00:00:00 python
 8528 ? 00:00:00 python
 8529 ? 00:00:00 python
 8530 ? 00:00:00 python
root@vaio:/tmp# /etc/init.d/mailman stop
 * Stopping Mailman master qrunner mailmanctl [ OK ]
root@vaio:/tmp# ps -u list
  PID TTY TIME CMD
 8490 ? 00:00:00 mailmanctl
 8491 ? 00:00:00 python
 8492 ? 00:00:00 python
 8493 ? 00:00:00 python
 8494 ? 00:00:00 python
 8495 ? 00:00:00 python
 8496 ? 00:00:00 python
 8497 ? 00:00:00 python
 8498 ? 00:00:00 python
root@vaio:/tmp# export LANG='C'
root@vaio:/tmp# /etc/init.d/mailman stop
 * Stopping Mailman master qrunner mailmanctl PID unreadable in: /var/run/mailman/mailman.pid
[Errno 2] No such file or directory: '/var/run/mailman/mailman.pid'
Is qrunner even running?

ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: mailman 1:2.1.13-1
Uname: Linux 2.6.36-rc5g+ i686
NonfreeKernelModules: nvidia
Architecture: i386
Date: Wed Sep 29 16:31:46 2010
ProcEnviron:
 PATH=(custom, user)
 LANG=it_IT.UTF-8
 SHELL=/bin/bash
SourcePackage: mailman