This bug was fixed in the package xdm - 1:1.1.10-3ubuntu1

---------------
xdm (1:1.1.10-3ubuntu1) natty; urgency=low

  * Merge from debian unstable.  Remaining changes: (LP: #682196)
    - debian/{rules, xdm.install, local/ubuntu*}:
      + Add Ubuntu graphics and configure xdm to use them by default.
    - debian/patches/ubuntu_no_whiteglass.diff: Don't hardcode
      the default Xcursor theme to whiteglass. Use the Ubuntu
      default x-cursor-theme instead.
  * debian/patches/ftbfs_binutils-gold.diff: Fix FTBFS with binutils-gold
    and ld --as-needed. (Closes: #556694)
  * Dropped changes, no longer applicable:
    - debian/{xdm.postinst.in, xdm.postrm.in, xdm.preinst.in}

xdm (1:1.1.10-3) unstable; urgency=low

  [ Samuel Thibault ]
  * Remove vt7 option on hurd-i386 (closes: #584829).

xdm (1:1.1.10-2) unstable; urgency=low

  [ Julien Cristau ]
  * debian.diff: stop defining XDMAUTHDIR, it's not used anymore.
  * debian.diff: replace references to the XFree86 X server with Xorg.
  * Set default system and user PATHs when running configure instead of
    patching xdm-config.
  * Drop obsolete upgrade code from pre-etch versions in preinst, postinst and
    postrm scripts.

  [ Sven Joachim ]
  * xdm.init: Implement "status" option (Closes: #583802).
    - Bump dependency on lsb-base to 3.2-14 for status_of_proc().

xdm (1:1.1.10-1) unstable; urgency=low

  * New upstream release.
    - don't delete the pid file from child xdm processes, closes: #372114
    - clear the "Login incorrect" message properly on next login,
      closes: #525596.  Thanks, Martin Dickopp!
    - fix xdmcp with net.ipv6.bindv6only=1
  * Patches merged upstream:
    - 02_xdm_zombie_no_error.diff
    - 15_xdm_openfiles.diff
    - 90_xdm_write_dummy_auth.diff
    - 91_xdm_saveserverauth_logging.diff
    - log_sourcing_better.diff
    - selinux_support.diff
    - storepid_rewrite.diff
  * Xstartup: use id -u $USER, not id -u, since this script is run as root.
    See #118677.
  * debian/rules: delete libtool m4 files on clean.
  * Introduce virtual facility x-display-manager for insserv
    (closes: #554839).  Thanks, Jonas Meurer!
  * debian/rules: kill gratuitous uses of $(CURDIR).
  * debian/xdm.pam: @include common-* after pam_env and friends, so that we
    still set env vars if e.g. common-auth contains a 'sufficient' module
    (closes: #444483).
  * debian/xdm.init: add Short-Description (closes: #510085).

xdm (1:1.1.9-2) unstable; urgency=low

  [ Cyril Brulebois ]
  * Add debian/patches/doc_mention_xdm.options.diff: mention
    xdm.options(5) in xdm(1), as suggested by Chris Pimlott some years ago
    (Closes: #135692).
  * Add myself to Uploaders.
  * Add ${misc:Depends}, and wrap Depends.

  [ Julien Cristau ]
  * greeter: fix logging of failed login attempts (cherry-picked from upstream
    git), closes: #576360.

xdm (1:1.1.9-1) unstable; urgency=low

  [ Julien Cristau ]
  * Xreset, Xstartup: don't add /usr/bin/X11 to PATH.
  * xdm.postrm: remove /etc/X11/default-display-manager on purge if it exists
    and points to xdm.  Fixes piuparts failure.
  * xdm.prerm uses ps, add Depends on procps.
  * Update patches 20_xdm_log_timestamp.diff and 21_xdm_log_append.diff.
  * Drop 01_xdm_include_fcntl.diff, not necessary.
  * 15_xdm_openfiles.diff: only keep the race condition fix.  The other change
    allowed passing NULL as third argument to openFiles(), and used to have an
    accompanying change in SetUserAuthorization() which seems to have
    disappeared since then, so this isn't necessary anymore.
  * log_sourcing_better.diff: resurrect patch header from the monolith's
    078_xdm_log_sourcing_better.diff.
  * Rename the build directory to not include DEB_BUILD_GNU_TYPE for no
    good reason.  Thanks, Colin Watson!
  * Remove myself from Uploaders
  * Get rid of obsolete svn $Id$ keywords in the packaging.

  [ Brice Goglin ]
  * New upstream release.
    + Drop 00_warning_fixes.diff, always entirely fixed upstream.
    + Drop openlog.diff, irrelevant now.
    + Drop 03_spelling.diff, 04_xdm_init_log_earlier.diff,
      07_xdm_more_debug.diff, 08_xdm_execute_more_debug.diff,
      09_xdm_syserrormsg.diff, 10_xdm_better_logging.diff,
      11_xdm_strerror.diff, 12_remove_pidfile.diff,
      applied upstream.
  * Refresh patches.
  * Add Xreset hook, closes: #571607.
  * Bump Standards-Version to 3.8.4, no changes.
  * Add myself to Uploaders.
 -- Artur Rona <email address hidden>   Sun, 30 Jan 2011 00:53:09 +0100