Arch Linux

Description:
When logging in with Slim (1.3.4-2), the login widgets disappear and then the system hangs. This occurred using Systemd and the provided slim.service, however it was reported on the forums to happen using initscripts as well. The problem does not occur when using the slim-nock (Slim w/o Consolekit support) from the AUR, which simply changes the use-consolekit compile flag.

Additional info
In the systemd logs:
Jul 26 20:07:54 naga slim[309]: /usr/bin/xauth: file /run/slim.auth does not exist
Jul 26 20:07:54 naga slim[309]: X.Org X Server 1.12.3
Jul 26 20:07:54 naga slim[309]: Release Date: 2012-07-09
Jul 26 20:07:54 naga slim[309]: X Protocol Version 11, Revision 0
Jul 26 20:07:54 naga slim[309]: Build Operating System: Linux 3.4.4-3-ARCH x86_64
Jul 26 20:07:54 naga slim[309]: Current Operating System: Linux naga 3.4.6-1-ARCH #1 SMP PREEMPT Fri Jul 20 08:21:26 CEST 2012 x86_64
Jul 26 20:07:54 naga slim[309]: Kernel command line: BOOT_IMAGE=/boot/vmlinuz-linux root=/dev/sda3 elevator=noop quiet libahci.ignore_sss=1 logo.nologo raid=noautodetect acpi_os_name=Linux ac
Jul 26 20:07:54 naga slim[309]: Build Date: 09 July 2012 03:59:39PM
Jul 26 20:07:54 naga slim[309]: Current version of pixman: 0.26.2
Jul 26 20:07:54 naga slim[309]: Before reporting problems, check http://wiki.x.org
Jul 26 20:07:54 naga slim[309]: to make sure that you have the latest version.
Jul 26 20:07:54 naga slim[309]: Markers: (--) probed, (**) from config file, (==) default setting,
Jul 26 20:07:54 naga slim[309]: (++) from command line, (!!) notice, (II) informational,
Jul 26 20:07:54 naga slim[309]: (WW) warning, (EE) error, (NI) not implemented, (??) unknown.
Jul 26 20:07:54 naga slim[309]: (==) Log file: "/var/log/Xorg.0.log", Time: Thu Jul 26 20:07:54 2012
Jul 26 20:07:54 naga slim[309]: (==) Using config directory: "/etc/X11/xorg.conf.d"
Jul 26 20:07:56 naga slim[309]: The XKEYBOARD keymap compiler (xkbcomp) reports:
Jul 26 20:07:56 naga slim[309]: > Warning: Compat map for group 2 redefined
Jul 26 20:07:56 naga slim[309]: > Using new definition
Jul 26 20:07:56 naga slim[309]: > Warning: Compat map for group 3 redefined
Jul 26 20:07:56 naga slim[309]: > Using new definition
Jul 26 20:07:56 naga slim[309]: > Warning: Compat map for group 4 redefined
Jul 26 20:07:56 naga slim[309]: > Using new definition
Jul 26 20:07:56 naga slim[309]: Errors from xkbcomp are not fatal to the X server
Jul 26 20:07:59 naga slim[309]: ehd_logctl: feature 1 is already zero
Jul 26 20:07:59 naga slim[309]: pam_unix(slim:session): session opened for user brandon by (uid=0)
Jul 26 20:07:59 naga slim[309]: ehd_logctl: feature 1 is already zero
Jul 26 20:07:59 naga slim[309]: *** glibc detected *** /usr/bin/slim: malloc(): memory corruption: 0x0000000001a2fa90 ***

Steps to reproduce:
Install Slim on a Systemd-based (or other?) machine, particularly if Consolekit has not been set up for any other purpose. Enable slim.service. Reboot and attempt to log in.