unity-2d-panel crashed with SIGSEGV in free()

[Nocchy]

I don't know .

ProblemType: Crash
DistroRelease: Ubuntu 11.10
Package: unity-2d-panel 4.8.0-0ubuntu1
ProcVersionSignature: Ubuntu 3.0.0-11.18-generic 3.0.4
Uname: Linux 3.0.0-11-generic i686
ApportVersion: 1.23-0ubuntu1
Architecture: i386
Date: Wed Sep 21 19:23:48 2011
ExecutablePath: /usr/bin/unity-2d-panel
ProcCmdline: unity-2d-panel
ProcEnviron:
 PATH=(custom, no user)
 LANG=it_IT.UTF-8
 SHELL=/bin/bash
SegvAnalysis:
 Segfault happened at: 0x7e8f1d: cmp 0xc(%eax),%esi
 PC (0x007e8f1d) ok
 source "0xc(%eax)" (0x0000000c) not located in a known VMA region (needed readable region)!
 destination "%esi" ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: unity-2d
StacktraceTop:
 ?? () from /lib/i386-linux-gnu/libc.so.6
 ?? () from /lib/i386-linux-gnu/libc.so.6
 free () from /lib/i386-linux-gnu/libc.so.6
 QImageData::~QImageData() () from /usr/lib/i386-linux-gnu/libQtGui.so.4
 QImage::~QImage() () from /usr/lib/i386-linux-gnu/libQtGui.so.4
Title: unity-2d-panel crashed with SIGSEGV in free()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare

[Apport retracing service (apport)]

StacktraceTop:
 malloc_consolidate (av=0x8f3400) at malloc.c:5161
 malloc_consolidate (av=0x8f3400) at malloc.c:5089
 _int_free (av=0x8f3400, p=0x96d0008) at malloc.c:5034
 __GI___libc_free (mem=0x96d0010) at malloc.c:3738
 QImageData::~QImageData (this=0x9691c28, __in_chrg=<optimized out>) at image/qimage.cpp:264

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.