unity-2d-panel crashed with SIGABRT in raise()

[Zorro]

I was trying to log in. Horribly unfair of me, I know, to expect a computer to do that.

ProblemType: Crash
DistroRelease: Ubuntu 11.10
Package: unity-2d-panel 4.6.1-0ubuntu1
ProcVersionSignature: Ubuntu 3.0.0-10.16-generic 3.0.4
Uname: Linux 3.0.0-10-generic x86_64
ApportVersion: 1.22.1-0ubuntu2
Architecture: amd64
CrashCounter: 1
Date: Fri Sep 9 15:06:40 2011
ExecutablePath: /usr/bin/unity-2d-panel
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1)
ProcCmdline: unity-2d-panel
ProcEnviron:
 PATH=(custom, user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
Signal: 6
SourcePackage: unity-2d
StacktraceTop:
 raise () from /lib/x86_64-linux-gnu/libc.so.6
 abort () from /lib/x86_64-linux-gnu/libc.so.6
 ?? () from /lib/x86_64-linux-gnu/libc.so.6
 ?? () from /lib/x86_64-linux-gnu/libc.so.6
 ?? () from /lib/x86_64-linux-gnu/libc.so.6
Title: unity-2d-panel crashed with SIGABRT in raise()
UpgradeStatus: Upgraded to oneiric on 2011-09-09 (0 days ago)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare

[Apport retracing service (apport)]

StacktraceTop:
 __libc_message (do_abort=2, fmt=0x7f4c601470d8 "*** glibc detected *** %s: %s: 0x%s ***\n") at ../sysdeps/unix/sysv/linux/libc_fatal.c:189
 malloc_printerr (action=3, str=0x7f4c601440d2 "corrupted double-linked list", ptr=<optimized out>) at malloc.c:6283
 _int_free (av=0x7f4c603821c0, p=0xf3ab30) at malloc.c:4973
 __GI___libc_free (mem=<optimized out>) at malloc.c:3738
 ~QForeachContainer (this=0x7fff0e8ec720, __in_chrg=<optimized out>) at /usr/include/qt4/QtCore/qglobal.h:2248