Application that crashed: plasma-desktop
Version of the application: 0.3
KDE Version: 4.2.98 (KDE 4.2.98 (KDE 4.3 RC3))
Qt Version: 4.5.0
Operating System: Linux 2.6.31-rc5 x86_64
Distribution: Ubuntu 9.04

What I was doing when the application crashed:
Repeated occurrence.

 -- Backtrace:
Application: Plasma Workspace (kdeinit4), signal: Segmentation fault
[Current thread is 0 (LWP 5414)]

Thread 2 (Thread 0x7fb90c032950 (LWP 5419)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:261
#1  0x00007fb92d4e2939 in QWaitCondition::wait (this=0x3915d90, mutex=0x3915d88, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:87
#2  0x00007fb92c35d4cc in QHostInfoAgent::run (this=0x3915d70) at kernel/qhostinfo.cpp:260
#3  0x00007fb92d4e1952 in QThreadPrivate::start (arg=0x3915d70) at thread/qthread_unix.cpp:189
#4  0x00007fb9293613ba in start_thread (arg=<value optimized out>) at pthread_create.c:297
#5  0x00007fb929f45fcd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#6  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7fb92daa7750 (LWP 5414)):
[KCrash Handler]
#5  0x00007fb924eaf7a4 in Plasma::ExtenderItem::group (this=0x4f13470) at /build/buildd/kde4libs-4.2.98a/plasma/extenderitem.cpp:321
#6  0x00007fb924eadf68 in Plasma::ExtenderGroup::items (this=0x38ccb80) at /build/buildd/kde4libs-4.2.98a/plasma/extendergroup.cpp:92
#7  0x00007fb90ef6f18f in SystemTray::ExtenderTaskBusyWidget::updateTask (this=0x3904080) at /build/buildd/kdebase-workspace-4.2.98/plasma/applets/systemtray/core/extendertask.cpp:155
#8  0x00007fb90ef6fb8d in SystemTray::ExtenderTaskBusyWidget::qt_metacall (this=0x3904080, _c=QMetaObject::InvokeMetaMethod, _id=37440, _a=<value optimized out>)
    at /build/buildd/kdebase-workspace-4.2.98/obj-x86_64-linux-gnu/plasma/applets/systemtray/extendertask.moc:69
#9  0x00007fb92d5e01f2 in QMetaObject::activate (sender=0x33018d0, from_signal_index=<value optimized out>, to_signal_index=9, argv=0x0) at kernel/qobject.cpp:3069
#10 0x00007fb90ef702d2 in SystemTray::Manager::notificationRemoved (this=0x4f13470, _t1=0x4ee52e0)
    at /build/buildd/kdebase-workspace-4.2.98/obj-x86_64-linux-gnu/plasma/applets/systemtray/manager.moc:160
#11 0x00007fb90ef71377 in SystemTray::Manager::qt_metacall (this=0x33018d0, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fff7e840a80)
    at /build/buildd/kdebase-workspace-4.2.98/obj-x86_64-linux-gnu/plasma/applets/systemtray/manager.moc:110
#12 0x00007fb92d5e01f2 in QMetaObject::activate (sender=0x4ee52e0, from_signal_index=<value optimized out>, to_signal_index=7, argv=0x0) at kernel/qobject.cpp:3069
#13 0x00007fb90ef72427 in SystemTray::Notification::destroyed (this=0x4f13470, _t1=0x4ee52e0)
    at /build/buildd/kdebase-workspace-4.2.98/obj-x86_64-linux-gnu/plasma/applets/systemtray/notification.moc:101
#14 0x00007fb90ef72e5b in ~Notification (this=0x4f13470) at /build/buildd/kdebase-workspace-4.2.98/plasma/applets/systemtray/core/notification.cpp:63
#15 0x00007fb90ef7fb71 in ~DBusNotification (this=0x4ee52e0) at /build/buildd/kdebase-workspace-4.2.98/plasma/applets/systemtray/protocols/notifications/dbusnotification.cpp:38
#16 0x00007fb92d5da865 in QObject::event (this=0x4ee52e0, e=0x3891870) at kernel/qobject.cpp:1101
#17 0x00007fb92ab5278d in QApplicationPrivate::notify_helper (this=0x263b620, receiver=0x4ee52e0, e=0x4c6e9e0) at kernel/qapplication.cpp:4084
#18 0x00007fb92ab5a97a in QApplication::notify (this=0x25fc7a0, receiver=0x4ee52e0, e=0x4c6e9e0) at kernel/qapplication.cpp:4049
#19 0x00007fb92bc9571b in KApplication::notify (this=0x25fc7a0, receiver=0x4ee52e0, event=0x4c6e9e0) at /build/buildd/kde4libs-4.2.98a/kdeui/kernel/kapplication.cpp:302
#20 0x00007fb92d5ca75c in QCoreApplication::notifyInternal (this=0x25fc7a0, receiver=0x4ee52e0, event=0x4c6e9e0) at kernel/qcoreapplication.cpp:602
#21 0x00007fb92d5cb3ca in QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x25b0320) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:213
#22 0x00007fb92d5f41e3 in postEventSourceDispatch (s=<value optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:218
#23 0x00007fb9295b020a in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#24 0x00007fb9295b38e0 in ?? () from /usr/lib/libglib-2.0.so.0
#25 0x00007fb9295b3a7c in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#26 0x00007fb92d5f3e6f in QEventDispatcherGlib::processEvents (this=0x263b150, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:323
#27 0x00007fb92abeabef in QGuiEventDispatcherGlib::processEvents (this=0x4f13470, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:202
#28 0x00007fb92d5c9002 in QEventLoop::processEvents (this=<value optimized out>, flags={i = 2122584944}) at kernel/qeventloop.cpp:149
#29 0x00007fb92d5c93cd in QEventLoop::exec (this=0x7fff7e8413b0, flags={i = 2122585024}) at kernel/qeventloop.cpp:200
#30 0x00007fb92d5cb694 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:880
#31 0x00007fb9214796bb in kdemain (argc=1, argv=0x25ecdf0) at /build/buildd/kdebase-workspace-4.2.98/plasma/shells/desktop/main.cpp:50
#32 0x0000000000407215 in launch (argc=1, _name=0x25ef068 "/usr/bin/plasma-desktop", args=<value optimized out>, cwd=0x0, envc=0, envs=0x25ef088 "", reset_env=false, tty=0x0, avoid_loops=false, 
    startup_id_str=0x40a3c9 "0") at /build/buildd/kde4libs-4.2.98a/kinit/kinit.cpp:676
#33 0x0000000000407a38 in handle_launcher_request (sock=8, who=<value optimized out>) at /build/buildd/kde4libs-4.2.98a/kinit/kinit.cpp:1168
#34 0x0000000000407fe5 in handle_requests (waitForPid=0) at /build/buildd/kde4libs-4.2.98a/kinit/kinit.cpp:1361
#35 0x0000000000408b26 in main (argc=2, argv=0x7fff7e842258, envp=0x7fff7e842270) at /build/buildd/kde4libs-4.2.98a/kinit/kinit.cpp:1788

Reported using DrKonqi