unity-2d-panel crashed with SIGSEGV in QConfSchema::findKey()

[krishna chaitanya chinnam]

while i was updating to 11.10 during installation of packages an error occured

ProblemType: Crash
DistroRelease: Ubuntu 11.10
Package: unity-2d-panel 4.2.0-0ubuntu1
ProcVersionSignature: User Name 3.0.0-9.14-generic 3.0.3
Uname: Linux 3.0.0-9-generic i686
Architecture: i386
Date: Sun Aug 28 21:47:59 2011
ExecutablePath: /usr/bin/unity-2d-panel
ProcCmdline: unity-2d-panel
ProcEnviron:
 LANGUAGE=en_IN:en
 PATH=(custom, no user)
 LANG=en_IN
 SHELL=/bin/bash
SegvAnalysis:
 Segfault happened at: 0xaec937 <_ZNK11QConfSchema7findKeyEPKc+39>: mov 0x8(%eax),%edx
 PC (0x00aec937) ok
 source "0x8(%eax)" (0xffff95c0) not located in a known VMA region (needed readable region)!
 destination "%edx" ok
SegvReason: reading unknown VMA
Signal: 11
SourcePackage: unity-2d
StacktraceTop:
 QConfSchema::findKey(char const*) const () from /usr/lib/libdconf-qt.so.0
 QConf::notify(char const*) () from /usr/lib/libdconf-qt.so.0
 ?? () from /usr/lib/libdconf-qt.so.0
 ?? () from /usr/lib/libdconf-dbus-1.so.0
 ?? () from /lib/i386-linux-gnu/libdbus-1.so.3
Title: unity-2d-panel crashed with SIGSEGV in QConfSchema::findKey()
UpgradeStatus: Upgraded to oneiric on 2011-08-28 (0 days ago)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare

[Apport retracing service (apport)]

StacktraceTop:
 QConfSchema::findKey(char const*) const () from /tmp/tmpDewSN1/usr/lib/libdconf-qt.so.0
 QConf::notify(char const*) () from /tmp/tmpDewSN1/usr/lib/libdconf-qt.so.0
 ?? () from /tmp/tmpDewSN1/usr/lib/libdconf-qt.so.0
 add_match_done (pending=0x97050a8, user_data=0x96bad80) at dconf-dbus-1.c:569
 ?? () from /tmp/tmpDewSN1/lib/i386-linux-gnu/libdbus-1.so.3