kdm fails to show user faces, says: "memory corruption detected"

[ubuntu at yendor.com]

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I'm using KDE on a fresh Kubuntu Dapper Flight (6.06).

Since the upgrade from Breezy Badger (5.10) I've noticed:

    1) User face icons don't show in KDM
    2) My logs show this:

Jun 10 21:37:48 <hostname> kdm: :0[4569]: (pam_unix) session opened for user
<username> by (uid=0)
Jun 10 21:37:48 <hostname> kdm_greet[4702]: Internal error: memory corruption detected

Enclosing possibly relevant lines from:

$ grep kdm /var/log/*
/var/log/dist-upgrade-term.log:Installing new version of config file /etc/kde3/kdm/backgroundrc ...
/var/log/dist-upgrade-term.log:Configuration file `/etc/kde3/kdm/kdmrc'
/var/log/dist-upgrade-term.log:*** kdmrc (Y/I/N/O/D/Z) [default=N] ?
/var/log/dist-upgrade-term.log:*** kdmrc (Y/I/N/O/D/Z) [default=N] ? y
/var/log/dist-upgrade-term.log:Installing new version of config file /etc/kde3/kdm/kdmrc ...
/var/log/dist-upgrade-term.log:Installing new version of config file /etc/kde3/kdm/Xsession ...
/var/log/dist-upgrade-term.log:Installing new version of config file /etc/kde3/kdm/Xstartup ...
/var/log/dist-upgrade-term.log:KDM theme customised or already enabled, not touching kdmrc ...
/var/log/dist-upgrade.log:2006-06-03 23:09:40,847 DEBUG got a conffile-prompt from dpkg for file: '/etc/kde3/kdm/kdmrc'
/var/log/dpkg.log:2006-06-03 17:44:45 upgrade kdm 4:3.4.3-0ubuntu6 4:3.5.2-0ubuntu26
/var/log/dpkg.log:2006-06-03 17:44:45 status half-configured kdm 4:3.4.3-0ubuntu6
/var/log/dpkg.log:2006-06-03 17:44:50 status unpacked kdm 4:3.4.3-0ubuntu6
/var/log/dpkg.log:2006-06-03 17:44:50 status half-installed kdm 4:3.4.3-0ubuntu6
/var/log/dpkg.log:2006-06-03 17:44:50 status half-installed kdm 4:3.4.3-0ubuntu6
/var/log/dpkg.log:2006-06-03 17:44:50 status unpacked kdm 4:3.5.2-0ubuntu26
/var/log/dpkg.log:2006-06-03 17:44:50 status unpacked kdm 4:3.5.2-0ubuntu26
/var/log/dpkg.log:2006-06-03 23:09:40 status unpacked kdm 4:3.5.2-0ubuntu26
/var/log/dpkg.log:2006-06-03 23:09:40 status unpacked kdm 4:3.5.2-0ubuntu26
/var/log/dpkg.log:2006-06-03 23:09:40 status unpacked kdm 4:3.5.2-0ubuntu26
/var/log/dpkg.log:2006-06-03 23:09:40 status unpacked kdm 4:3.5.2-0ubuntu26
/var/log/dpkg.log:2006-06-03 23:09:40 status unpacked kdm 4:3.5.2-0ubuntu26
/var/log/dpkg.log:2006-06-03 23:09:40 status unpacked kdm 4:3.5.2-0ubuntu26
/var/log/dpkg.log:2006-06-03 23:09:40 status unpacked kdm 4:3.5.2-0ubuntu26
/var/log/dpkg.log:2006-06-03 23:11:35 conffile /etc/kde3/kdm/kdmrc install
/var/log/dpkg.log:2006-06-03 23:11:35 status unpacked kdm 4:3.5.2-0ubuntu26
/var/log/dpkg.log:2006-06-03 23:11:35 status unpacked kdm 4:3.5.2-0ubuntu26
/var/log/dpkg.log:2006-06-03 23:11:35 status unpacked kdm 4:3.5.2-0ubuntu26
/var/log/dpkg.log:2006-06-03 23:11:35 status unpacked kdm 4:3.5.2-0ubuntu26
/var/log/dpkg.log:2006-06-03 23:11:35 status unpacked kdm 4:3.5.2-0ubuntu26
/var/log/dpkg.log:2006-06-03 23:11:35 status unpacked kdm 4:3.5.2-0ubuntu26
/var/log/dpkg.log:2006-06-03 23:11:35 status unpacked kdm 4:3.5.2-0ubuntu26
/var/log/dpkg.log:2006-06-03 23:11:35 status half-configured kdm 4:3.5.2-0ubuntu26
/var/log/dpkg.log:2006-06-03 23:11:48 status installed kdm 4:3.5.2-0ubuntu26
/var/log/syslog:Jun 10 21:37:19 ori kdm_greet[4702]: Can't open default user face
/var/log/syslog:Jun 10 21:37:48 ori kdm_greet[4702]: Internal error: memory corruption detected

/var/log/dpkg.log:2006-06-03 23:11:48 status installed kdm 4:3.5.2-0ubuntu26
/var/log/syslog:Jun 10 21:37:19 ori kdm_greet[4702]: Can't open default user face
/var/log/syslog:Jun 10 21:37:48 ori kdm_greet[4702]: Internal error: memory corruption detected




-- System Information:
Debian Release: testing/unstable
  APT prefers dapper-updates
  APT policy: (500, 'dapper-updates'), (500, 'dapper-security'), (500, 'dapper')
Architecture: i386 (i686)
Shell:  /bin/sh linked to /bin/bash
Kernel: Linux 2.6.15-23-386
Locale: LANG=C, LC_CTYPE=C (charmap=ANSI_X3.4-1968)

Versions of packages kdm depends on:
ii  debconf [debconf-2.0]  1.4.72ubuntu9     Debian configuration management sy
ii  kdebase-bin            4:3.5.2-0ubuntu26 core binaries for the KDE base mod
ii  kdebase-data           4:3.5.2-0ubuntu26 shared data files for the KDE base
ii  kdelibs4c2a            4:3.5.2-0ubuntu18 core libraries for all KDE applica
ii  libc6                  2.3.6-0ubuntu20   GNU C Library: Shared libraries an
ii  libgcc1                1:4.0.3-1ubuntu5  GCC support library
ii  libpam-runtime         0.79-3ubuntu14    Runtime support for the PAM librar
ii  libpam0g               0.79-3ubuntu14    Pluggable Authentication Modules l
ii  libqt3-mt              3:3.3.6-1ubuntu3  Qt GUI Library (Threaded runtime v
ii  libstdc++6             4.0.3-1ubuntu5    The GNU Standard C++ Library v3
ii  libx11-6               2:1.0.0-0ubuntu9  X11 client-side library
ii  libxau6                1:1.0.0-0ubuntu4  X11 authorisation library
ii  libxdmcp6              1:1.0.0-0ubuntu2  X11 Display Manager Control Protoc
ii  libxtst6               2:1.0.1-0ubuntu2  X11 Testing -- Resource extension 
ii  xauth                  1:1.0.1-0ubuntu1  X authentication utility

Versions of packages kdm recommends:
ii  logrotate                     3.7.1-2    Log rotation utility

-- debconf information:
  kdm/stop_running_server_with_children: false
* shared/default-x-display-manager: kdm
  kdm/daemon_name: /usr/bin/kdm