This description generated by Andreas from an ABRT report
architecture: i686
cmdline: /usr/libexec/gdm-user-switch-applet --oaf-activate-iid=OAFIID:GNOME_FastUserSwitchApplet_Factory --oaf-ior-fd=28
component: gdm
executable: /usr/libexec/gdm-user-switch-applet
kernel: 2.6.32-131.2.1.el6.i686
package: gdm-user-switch-applet-2.30.4-21.el6_0.1
reason: Process /usr/libexec/gdm-user-switch-applet was killed by signal 6 (SIGABRT)
release: Red Hat Enterprise Linux Workstation release 6.1 (Santiago)
reproduce: 1.When I logged in
2.
3.

time: 1307988101
uid: 2011
backtrace: warning: core file may not match specified executable file.
[New Thread 2851]
[New Thread 2862]
[Thread debugging using libthread_db enabled]
Core was generated by `/usr/libexec/gdm-user-switch-applet --oaf-activate-iid=OAFIID:GNOME_FastUserSwi'.
Program terminated with signal 6, Aborted.
#0  0x00cbf424 in __kernel_vsyscall ()

Thread 2 (Thread 0xb74d6b70 (LWP 2862)):
#0  0x00cbf424 in __kernel_vsyscall ()
No symbol table info available.
#1  0x00b756a4 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
No symbol table info available.
#2  0x00d1cf3f in ?? () from /lib/libgthread-2.0.so.0
No symbol table info available.
#3  0x00bb994c in ?? () from /lib/libglib-2.0.so.0
No symbol table info available.
#4  0x00bb9a66 in g_async_queue_timed_pop () from /lib/libglib-2.0.so.0
No symbol table info available.
#5  0x00c0ae5b in ?? () from /lib/libglib-2.0.so.0
No symbol table info available.
#6  0x00c098a0 in ?? () from /lib/libglib-2.0.so.0
No symbol table info available.
#7  0x00b719e9 in start_thread () from /lib/libpthread.so.0
No symbol table info available.
#8  0x00a840fe in clone () from /lib/libc.so.6
No symbol table info available.

Thread 1 (Thread 0xb771b870 (LWP 2851)):
#0  0x00cbf424 in __kernel_vsyscall ()
No symbol table info available.
#1  0x009d0d71 in raise () from /lib/libc.so.6
No symbol table info available.
#2  0x009d264a in abort () from /lib/libc.so.6
No symbol table info available.
#3  0x00c062ff in g_assertion_message () from /lib/libglib-2.0.so.0
No symbol table info available.
#4  0x00c0689e in g_assertion_message_expr () from /lib/libglib-2.0.so.0
No symbol table info available.
#5  0x08051873 in ?? ()
No symbol table info available.
#6  0x0805255f in ?? ()
No symbol table info available.
#7  0x00bdcdf2 in ?? () from /lib/libglib-2.0.so.0
No symbol table info available.
#8  0x00bdec78 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
No symbol table info available.
#9  0x00be25e0 in ?? () from /lib/libglib-2.0.so.0
No symbol table info available.
#10 0x00be29ff in g_main_loop_run () from /lib/libglib-2.0.so.0
No symbol table info available.
#11 0x04a71ac4 in bonobo_main () from /usr/lib/libbonobo-2.so.0
No symbol table info available.
#12 0x04a6fc4f in bonobo_generic_factory_main_timeout () from /usr/lib/libbonobo-2.so.0
No symbol table info available.
#13 0x04a6fcd4 in bonobo_generic_factory_main () from /usr/lib/libbonobo-2.so.0
No symbol table info available.
#14 0x005c7f75 in panel_applet_factory_main_closure () from /usr/lib/libpanel-applet-2.so.0
No symbol table info available.
#15 0x005c805c in panel_applet_factory_main () from /usr/lib/libpanel-applet-2.so.0
No symbol table info available.
#16 0x0804cf92 in ?? ()
No symbol table info available.
#17 0x009bccc6 in __libc_start_main () from /lib/libc.so.6
No symbol table info available.
#18 0x0804cdb1 in ?? ()
No symbol table info available.
From        To          Syms Read   Shared Object Library
0x006706d0  0x006826d8  Yes (*)     /usr/lib/libdbus-glib-1.so.2
0x00389220  0x003b55e8  Yes (*)     /lib/libdbus-1.so.3
0x00b6f5e0  0x00b7b628  Yes (*)     /lib/libpthread.so.0
0x005c7440  0x005cd228  Yes (*)     /usr/lib/libpanel-applet-2.so.0
0x0086bf00  0x008895f8  Yes (*)     /usr/lib/libgconf-2.so.4
0x03f3b1d0  0x03f760d8  Yes (*)     /usr/lib/libbonoboui-2.so.0
0x052bae70  0x05591138  Yes (*)     /usr/lib/libgtk-x11-2.0.so.0
0x03e4e2f0  0x03eb3fa8  Yes (*)     /usr/lib/libgdk-x11-2.0.so.0
0x00d54bb0  0x00dc0398  Yes (*)     /lib/libgio-2.0.so.0
0x00444190  0x004569f8  Yes (*)     /usr/lib/libgdk_pixbuf-2.0.so.0
0x00533210  0x0058d328  Yes (*)     /usr/lib/libcairo.so.2
0x003ff180  0x00421178  Yes (*)     /usr/lib/libpango-1.0.so.0
0x04a6c320  0x04a9cb78  Yes (*)     /usr/lib/libbonobo-2.so.0
0x04996080  0x0499f238  Yes (*)     /usr/lib/libbonobo-activation.so.4
0x00116500  0x00141c38  Yes (*)     /lib/libgobject-2.0.so.0
0x00bb7b40  0x00c35098  Yes (*)     /lib/libglib-2.0.so.0
0x009bcaa0  0x00ae0e44  Yes (*)     /lib/libc.so.6
0x00b9e880  0x00ba26b8  Yes (*)     /lib/librt.so.1
0x00980830  0x0099832f  Yes (*)     /lib/ld-linux.so.2
0x00811d90  0x008397c8  Yes (*)     /usr/lib/libORBit-2.so.0
0x00168370  0x001f98d8  Yes (*)     /usr/lib/libX11.so.6
0x00d15c30  0x00d16d88  Yes (*)     /lib/libgmodule-2.0.so.0
0x03ef9fd0  0x03f193e8  Yes (*)     /usr/lib/libgnomecanvas-2.so.0
0x04bc8350  0x04bda418  Yes (*)     /usr/lib/libart_lgpl_2.so.2
0x04c59ed0  0x04c64bb8  Yes (*)     /usr/lib/libgnome-2.so.0
0x00d1bf40  0x00d1d6b8  Yes (*)     /lib/libgthread-2.0.so.0
0x006c9b00  0x007af1b8  Yes (*)     /usr/lib/libxml2.so.2
0x005111b0  0x0051e2e8  Yes (*)     /usr/lib/libatk-1.0.so.0
0x0046b2b0  0x00486a38  Yes (*)     /usr/lib/libpangoft2-1.0.so.0
0x00495610  0x0049aae8  Yes (*)     /usr/lib/libpangocairo-1.0.so.0
0x002963c0  0x002ff7a8  Yes (*)     /usr/lib/libfreetype.so.6
0x00350f60  0x0036ccf8  Yes (*)     /usr/lib/libfontconfig.so.1
0x00921380  0x00925d28  Yes (*)     /usr/lib/libSM.so.6
0x0095f530  0x0096f208  Yes (*)     /usr/lib/libICE.so.6
0x048af350  0x048b4b38  Yes (*)     /lib/libpopt.so.0
0x003cde70  0x003d03a8  Yes (*)     /usr/lib/libXfixes.so.3
0x00b3b470  0x00b55968  Yes (*)     /lib/libm.so.6
0x0032b720  0x00335f48  Yes (*)     /usr/lib/libXext.so.6
0x003d52c0  0x003db178  Yes (*)     /usr/lib/libXrender.so.1
0x00dfa780  0x00dfb258  Yes (*)     /usr/lib/libXinerama.so.1
0x0033d780  0x00347628  Yes (*)     /usr/lib/libXi.so.6
0x003e0150  0x003e4c58  Yes (*)     /usr/lib/libXrandr.so.2
0x003eae40  0x003f0418  Yes (*)     /usr/lib/libXcursor.so.1
0x040b5890  0x040b6488  Yes (*)     /usr/lib/libXcomposite.so.1
0x006647c0  0x00665248  Yes (*)     /usr/lib/libXdamage.so.1
0x00b64a60  0x00b65a88  Yes (*)     /lib/libdl.so.2
0x00cfc650  0x00d0af78  Yes (*)     /lib/libresolv.so.2
0x00c97370  0x00ca8fc8  Yes (*)     /lib/libselinux.so.1
0x004a16f0  0x004bd6d8  Yes (*)     /usr/lib/libpng12.so.0
0x005d4b40  0x0062cad8  Yes (*)     /usr/lib/libpixman-1.so.0
0x00b89620  0x00b94888  Yes (*)     /lib/libz.so.1
0x04abfc50  0x04ac0968  Yes (*)     /usr/lib/libORBitCosNaming-2.so.0
0x00d28e80  0x00d37608  Yes (*)     /usr/lib/libxcb.so.1
0x005aff70  0x005b3ac8  Yes (*)     /usr/lib/libgailutil.so.18
0x04b072a0  0x04b43d08  Yes (*)     /usr/lib/libgnomevfs-2.so.0
0x004c8040  0x004e0ef8  Yes (*)     /lib/libexpat.so.1
0x00859fc0  0x0085bbe8  Yes (*)     /lib/libuuid.so.1
0x00df5a00  0x00df67f8  Yes (*)     /usr/lib/libXau.so.6
0x0465be60  0x046934a8  Yes (*)     /usr/lib/libssl.so.10
0x042e6e80  0x043ca038  Yes (*)     /usr/lib/libcrypto.so.10
0x04af1940  0x04af2ac8  Yes (*)     /usr/lib/libavahi-glib.so.1
0x048eb550  0x048f17a8  Yes (*)     /usr/lib/libavahi-common.so.3
0x049008e0  0x04909f58  Yes (*)     /usr/lib/libavahi-client.so.3
0x00978a20  0x009792c8  Yes (*)     /lib/libutil.so.1
0x008e6540  0x00913d18  Yes (*)     /lib/libgssapi_krb5.so.2
0x0444a160  0x044c4438  Yes (*)     /lib/libkrb5.so.3
0x0089ce30  0x0089db68  Yes (*)     /lib/libcom_err.so.2
0x008b5c10  0x008d1198  Yes (*)     /lib/libk5crypto.so.3
0x008a3d10  0x008a8e98  Yes (*)     /lib/libkrb5support.so.0
0x008ae950  0x008af1d8  Yes (*)     /lib/libkeyutils.so.1
0x0028c350  0x0028cc88  Yes (*)     /usr/lib/gconv/ISO8859-1.so
0x004efa00  0x004f7998  Yes (*)     /lib/libnss_files.so.2
0x0092aad0  0x0094ec18  Yes (*)     /usr/lib/gtk-2.0/2.10.0/engines/libclearlooks.so
0x00460070  0x004609d8  Yes (*)     /usr/lib/gtk-2.0/modules/libpk-gtk-module.so
0x004fd680  0x004ff778  Yes (*)     /usr/lib/gtk-2.0/modules/libcanberra-gtk-module.so
0x005024f0  0x005039d8  Yes (*)     /usr/lib/libcanberra-gtk.so.0
0x0063c3c0  0x006462f8  Yes (*)     /usr/lib/libcanberra.so.0
0x04d55720  0x04d5a858  Yes (*)     /usr/lib/libvorbisfile.so.3
0x04d29a10  0x04d3fd48  Yes (*)     /usr/lib/libvorbis.so.0
0x04bba310  0x04bbcb88  Yes (*)     /usr/lib/libogg.so.0
0x04d16610  0x04d1f858  Yes (*)     /usr/lib/libtdb.so.1
0x005b7a30  0x005bc468  Yes (*)     /usr/lib/libltdl.so.7
0x0064cb00  0x00659208  Yes (*)     /usr/lib/gio/modules/libgioremote-volume-monitor.so
0x00692990  0x0069d4d8  Yes (*)     /usr/lib/libgvfscommon.so.0
0x00e2b380  0x00e45f98  Yes (*)     /usr/lib/gio/modules/libgvfsdbus.so
0x04512f40  0x0451c9a8  Yes (*)     /lib/libudev.so.0
(*): Shared library is missing debugging information.
$1 = 0x0
No symbol table is loaded.  Use the "file" command.
eax            0x0	0
ecx            0xb23	2851
edx            0x6	6
ebx            0xb23	2851
esp            0xbff1af48	0xbff1af48
ebp            0xbff1af60	0xbff1af60
esi            0x96c2020	158081056
edi            0xb31ff4	11739124
eip            0xcbf424	0xcbf424 <__kernel_vsyscall+16>
eflags         0x202	[ IF ]
cs             0x73	115
ss             0x7b	123
ds             0x7b	123
es             0x7b	123
fs             0x0	0
gs             0x33	51
Dump of assembler code for function __kernel_vsyscall:
   0x00cbf414 <+0>:	push   %ecx
   0x00cbf415 <+1>:	push   %edx
   0x00cbf416 <+2>:	push   %ebp
   0x00cbf417 <+3>:	mov    %esp,%ebp
   0x00cbf419 <+5>:	sysenter 
   0x00cbf41b <+7>:	nop
   0x00cbf41c <+8>:	nop
   0x00cbf41d <+9>:	nop
   0x00cbf41e <+10>:	nop
   0x00cbf41f <+11>:	nop
   0x00cbf420 <+12>:	nop
   0x00cbf421 <+13>:	nop
   0x00cbf422 <+14>:	jmp    0xcbf417 <__kernel_vsyscall+3>
=> 0x00cbf424 <+16>:	pop    %ebp
   0x00cbf425 <+17>:	pop    %edx
   0x00cbf426 <+18>:	pop    %ecx
   0x00cbf427 <+19>:	ret    
End of assembler dump.