xfce4-settings-helper crashed with SIGSEGV in SmcCloseConnection()

[Florent]

Binary package hint: xfce4-settings

crashed on shutdown, probably

ProblemType: Crash
Architecture: i386
DistroRelease: Ubuntu 9.04
ExecutablePath: /usr/bin/xfce4-settings-helper
NonfreeKernelModules: ath_hal
Package: xfce4-settings 4.6.0-1ubuntu2
ProcCmdline: xfce4-settings-helper
ProcEnviron:
 LANG=fr_FR.UTF-8
 SHELL=/bin/bash
Signal: 11
SourcePackage: xfce4-settings
Stacktrace:
 #0 0xb73b3f6e in SmcCloseConnection () from /usr/lib/libSM.so.6
 #1 0xb7efdfe7 in client_session_free () from /usr/lib/libxfcegui4.so.4
 #2 0x0804bc36 in ?? ()
 #3 0xb7689775 in __libc_start_main () from /lib/tls/i686/cmov/libc.so.6
 #4 0x0804b451 in ?? ()
StacktraceTop:
 SmcCloseConnection () from /usr/lib/libSM.so.6
 client_session_free () from /usr/lib/libxfcegui4.so.4
 ?? ()
 __libc_start_main () from /lib/tls/i686/cmov/libc.so.6
 ?? ()
Title: xfce4-settings-helper crashed with SIGSEGV in SmcCloseConnection()
Uname: Linux 2.6.28-13-generic i686
UserGroups: adm admin cdrom dialout fuse lpadmin plugdev sambashare

[Apport retracing service (apport)]

StacktraceTop:SmcCloseConnection (smcConn=0x0, count=0, reasonMsgs=0x0)
client_session_free (session_client=0x9316df8)
main (argc=) at main.c:150