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

[crtm]

after update, today, then crash

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
NonfreeKernelModules: nvidia
ApportVersion: 1.22.1-0ubuntu2
Architecture: amd64
Date: Fri Sep 9 12:22:46 2011
ExecutablePath: /usr/bin/unity-2d-panel
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1)
ProcCmdline: unity-2d-panel
ProcCwd: /home/carlos
ProcEnviron:
 LANGUAGE=es_AR:es
 PATH=(custom, no user)
 LANG=es_AR.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
 free () from /lib/x86_64-linux-gnu/libc.so.6
Title: unity-2d-panel crashed with SIGABRT in raise()
UpgradeStatus: Upgraded to oneiric on 2011-09-02 (7 days ago)
UserGroups: adm admin cdrom dialout lp lpadmin plugdev sambashare vboxusers

[Apport retracing service (apport)]

StacktraceTop:
 __libc_message (do_abort=2, fmt=0x7f73edd540d8 "*** glibc detected *** %s: %s: 0x%s ***\n") at ../sysdeps/unix/sysv/linux/libc_fatal.c:189
 malloc_printerr (action=3, str=0x7f73edd54278 "double free or corruption (!prev)", ptr=<optimized out>) at malloc.c:6283
 __GI___libc_free (mem=<optimized out>) at malloc.c:3738
 ?? () from /tmp/tmp8ouDx5/usr/lib/nvidia-current/tls/libnvidia-tls.so.280.13
 IndicatorsWidget::onEntryRemoved(std::string const&) () from /tmp/tmp8ouDx5/usr/lib/libunity-2d-private.so.0