xfce4-panel crashed with SIGSEGV in _IceTransWrite()

[R.M.]

Binary package hint: xfce4-panel

after installed lucid and clicked logout screen it crashed

ProblemType: Crash
Architecture: i386
Date: Wed Feb 24 13:30:32 2010
DistroRelease: Ubuntu 10.04
ExecutablePath: /usr/bin/xfce4-panel
LiveMediaBuild: Xubuntu 10.04 "Lucid Lynx" - Alpha i386 (20100223)
Package: xfce4-panel 4.6.3-1ubuntu2
ProcCmdline: xfce4-panel
ProcEnviron:
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.32-14.20-generic
SegvAnalysis:
 Segfault happened at: 0x78595c <_IceTransWrite+12>: mov (%eax),%edx
 PC (0x0078595c) ok
 source "(%eax)" (0x65676e61) not located in a known VMA region (needed readable region)!
 destination "%edx" ok
SegvReason: reading unknown VMA
Signal: 11
SourcePackage: xfce4-panel
StacktraceTop:
 _IceTransWrite () from /usr/lib/libICE.so.6
 _IceWrite () from /usr/lib/libICE.so.6
 IceFlush () from /usr/lib/libICE.so.6
 SmcRequestSaveYourself () from /usr/lib/libSM.so.6
 logout_session () from /usr/lib/libxfcegui4.so.4
Title: xfce4-panel crashed with SIGSEGV in _IceTransWrite()
Uname: Linux 2.6.32-14-generic i686
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare

[Apport retracing service (apport)]

Thank you for taking the time to report this crash and helping to make Ubuntu better. This particular crash has already been reported and is a duplicate of bug #480094, so is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Please continue to report any other bugs you may find.