Application: plasma-desktop (0.3)
KDE Platform Version: 4.4.00 (KDE 4.4.0)
Qt Version: 4.6.1
Operating System: Linux 2.6.31-20-generic x86_64
Distribution: Ubuntu 9.10

-- Information about the crash:
After updating from KDE 4.3.5 to 4.4, and restarting the computer, there was some panels that I didn´t added to my desktop (seems that my old config was merged with the KDE default one).
So I removed the panel that I didn´t want to. Right after all the desktop disappeared, and reappear some seconds later (seems that Plasma restarted).

 -- Backtrace:
Application: Espaço de trabalho do Plasma (kdeinit4), signal: Segmentation fault
The current source language is "auto; currently c".
[Current thread is 1 (Thread 0x7fa756e7a7f0 (LWP 8264))]

Thread 2 (Thread 0x7fa729b1e910 (LWP 8268)):
#0  0x00007fa753e843c3 in *__GI___poll (fds=<value optimized out>, nfds=<value optimized out>, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007fa75066137c in ?? () from /lib/libglib-2.0.so.0
#2  0x00007fa7506616c0 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#3  0x00007fa7554784b6 in QEventDispatcherGlib::processEvents (this=0x3446e80, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:414
#4  0x00007fa75544d862 in QEventLoop::processEvents (this=<value optimized out>, flags=) at kernel/qeventloop.cpp:149
#5  0x00007fa75544dc3c in QEventLoop::exec (this=0x7fa729b1df60, flags=) at kernel/qeventloop.cpp:201
#6  0x00007fa755357d29 in QThread::exec (this=<value optimized out>) at thread/qthread.cpp:487
#7  0x00007fa75542e098 in QInotifyFileSystemWatcherEngine::run (this=0x34d3870) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007fa75535a745 in QThreadPrivate::start (arg=0x34d3870) at thread/qthread_unix.cpp:248
#9  0x00007fa7550cba04 in start_thread (arg=<value optimized out>) at pthread_create.c:300
#10 0x00007fa753e9080d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7fa756e7a7f0 (LWP 8264)):
[KCrash Handler]
#5  QList (this=0x0) at /usr/include/qt4/QtCore/qlist.h:114
#6  Plasma::Corona::containments (this=0x0) at ../../plasma/corona.cpp:447
#7  0x00007fa74d4279d5 in Plasma::Extender::item (this=0x37d8580, name=...) at ../../plasma/extenders/extender.cpp:212
#8  0x00007fa74d427e99 in Plasma::Extender::group (this=0x7fff8c0539c0, name=...) at ../../plasma/extenders/extender.cpp:234
#9  0x00007fa7311db896 in ?? () from /usr/lib/kde4/plasma_applet_systemtray.so
#10 0x00007fa7311dbef8 in ?? () from /usr/lib/kde4/plasma_applet_systemtray.so
#11 0x00007fa74d401f4f in qDeleteAll<QList<Plasma::Applet*>::const_iterator> (this=0x31d2670, __in_chrg=<value optimized out>) at /usr/include/qt4/QtCore/qalgorithms.h:322
#12 qDeleteAll<QList<Plasma::Applet*> > (this=0x31d2670, __in_chrg=<value optimized out>) at /usr/include/qt4/QtCore/qalgorithms.h:330
#13 ~ContainmentPrivate (this=0x31d2670, __in_chrg=<value optimized out>) at ../../plasma/private/containment_p.h:62
#14 ~Containment (this=0x31d2670, __in_chrg=<value optimized out>) at ../../plasma/containment.cpp:142
#15 0x00007fa737501ee9 in ?? () from /usr/lib/kde4/plasma_containment_panel.so
#16 0x00007fa75545ec9d in QObject::event (this=0x31d2670, e=0x4220270) at kernel/qobject.cpp:1231
#17 0x00007fa754c31b7b in QGraphicsWidget::event (this=0x31d2670, event=0x4220270) at graphicsview/qgraphicswidget.cpp:1361
#18 0x00007fa7545edfac in QApplicationPrivate::notify_helper (this=0x20fd1a0, receiver=0x31d2670, e=0x4220270) at kernel/qapplication.cpp:4298
#19 0x00007fa7545f459b in QApplication::notify (this=0x20f4130, receiver=0x31d2670, e=0x4220270) at kernel/qapplication.cpp:4181
#20 0x00007fa755996d16 in KApplication::notify (this=0x20f4130, receiver=0x31d2670, event=0x4220270) at ../../kdeui/kernel/kapplication.cpp:302
#21 0x00007fa75544ef3c in QCoreApplication::notifyInternal (this=0x20f4130, receiver=0x31d2670, event=0x4220270) at kernel/qcoreapplication.cpp:704
#22 0x00007fa7554516b7 in QCoreApplication::sendEvent (receiver=0x0, event_type=<value optimized out>, data=0x20852e0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#23 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=<value optimized out>, data=0x20852e0) at kernel/qcoreapplication.cpp:1345
#24 0x00007fa755478923 in QCoreApplication::sendPostedEvents (s=<value optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:220
#25 postEventSourceDispatch (s=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:276
#26 0x00007fa75065dbce in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#27 0x00007fa750661598 in ?? () from /lib/libglib-2.0.so.0
#28 0x00007fa7506616c0 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#29 0x00007fa755478463 in QEventDispatcherGlib::processEvents (this=0x20867f0, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:412
#30 0x00007fa75469d7ee in QGuiEventDispatcherGlib::processEvents (this=0x7fff8c0539c0, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#31 0x00007fa75544d862 in QEventLoop::processEvents (this=<value optimized out>, flags=) at kernel/qeventloop.cpp:149
#32 0x00007fa75544dc3c in QEventLoop::exec (this=0x7fff8c054590, flags=) at kernel/qeventloop.cpp:201
#33 0x00007fa75545197b in QCoreApplication::exec () at kernel/qcoreapplication.cpp:981
#34 0x00007fa7483960a2 in kdemain () from /usr/lib/libkdeinit4_plasma-desktop.so
#35 0x0000000000406fb8 in launch (argc=1, _name=<value optimized out>, args=<value optimized out>, cwd=<value optimized out>, envc=0, envs=<value optimized out>, reset_env=false, tty=0x0, 
    avoid_loops=false, startup_id_str=0x40a499 "0") at ../../kinit/kinit.cpp:717
#36 0x0000000000407c70 in handle_launcher_request (sock=8, who=<value optimized out>) at ../../kinit/kinit.cpp:1209
#37 0x0000000000408121 in handle_requests (waitForPid=0) at ../../kinit/kinit.cpp:1402
#38 0x0000000000408df2 in main (argc=4, argv=<value optimized out>, envp=<value optimized out>) at ../../kinit/kinit.cpp:1841

Reported using DrKonqi