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 2.6.28-14-generic i686
Distribution: Ubuntu 9.04

What I was doing when the application crashed:
When the crash arrive this program whose running:
- Dolphin
-Firefox
- Kontact
- Kopete
And plasma crach after I try to directly start Kaffeine by runing a movie.

 -- Backtrace:
Application: Plasma Workspace (kdeinit4), signal: Segmentation fault
[Current thread is 0 (LWP 3759)]

Thread 3 (Thread 0xa8298b90 (LWP 3762)):
#0  0xb7fc1430 in __kernel_vsyscall ()
#1  0xb64890e5 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/tls/i686/cmov/libpthread.so.0
#2  0xb66692ed in pthread_cond_wait () from /lib/tls/i686/cmov/libc.so.6
#3  0xb7dbf9b2 in QWaitCondition::wait (this=0xa3767b8, mutex=0xa3767b4, time=4294967295) at thread/qwaitcondition_unix.cpp:87
#4  0xb76f8152 in QHostInfoAgent::run (this=0xa3767a8) at kernel/qhostinfo.cpp:260
#5  0xb7dbe96e in QThreadPrivate::start (arg=0xa3767a8) at thread/qthread_unix.cpp:189
#6  0xb64854ff in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#7  0xb665a49e in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 2 (Thread 0xa2e13b90 (LWP 3763)):
#0  0xb7fc1430 in __kernel_vsyscall ()
#1  0xb6489412 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib/tls/i686/cmov/libpthread.so.0
#2  0xb6669344 in pthread_cond_timedwait () from /lib/tls/i686/cmov/libc.so.6
#3  0xb7dbe359 in thread_sleep (ti=0xa2e132b0) at thread/qthread_unix.cpp:298
#4  0xb7dbe48b in QThread::msleep (msecs=<value optimized out>) at thread/qthread_unix.cpp:324
#5  0xa835b0c8 in ?? () from /usr/lib/kde4/plasma_applet_cwp.so
#6  0xb7dbe96e in QThreadPrivate::start (arg=0xa4fa230) at thread/qthread_unix.cpp:189
#7  0xb64854ff in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#8  0xb665a49e in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 1 (Thread 0xb5f93a10 (LWP 3759)):
[KCrash Handler]
#6  AbstractTaskItem::basicPreferredSize (this=0xb1cb4e8) at /build/buildd/kdebase-workspace-4.2.98/plasma/applets/tasks/tasks.h:92
#7  0xa86585dc in TaskItemLayout::maximumRows (this=0xa29ae90) at /build/buildd/kdebase-workspace-4.2.98/plasma/applets/tasks/taskitemlayout.cpp:185
#8  0xa8661dc4 in TaskGroupItem::optimumCapacity (this=0xa301a30) at /build/buildd/kdebase-workspace-4.2.98/plasma/applets/tasks/taskgroupitem.cpp:1224
#9  0xa8653398 in Tasks::adjustGroupingStrategy (this=0xa019568) at /build/buildd/kdebase-workspace-4.2.98/plasma/applets/tasks/tasks.cpp:241
#10 0xa865362c in Tasks::constraintsEvent (this=0xa019568, constraints={i = -1080179200}) at /build/buildd/kdebase-workspace-4.2.98/plasma/applets/tasks/tasks.cpp:165
#11 0xb5cfd7e0 in Plasma::Applet::flushPendingConstraintsEvents (this=0xa019568) at /build/buildd/kde4libs-4.2.98a/plasma/applet.cpp:1168
#12 0xb5cfdee8 in Plasma::Applet::timerEvent (this=0xa019568, event=0xbf9dcafc) at /build/buildd/kde4libs-4.2.98a/plasma/applet.cpp:2112
#13 0xb7ec315f in QObject::event (this=0xa019568, e=0xbf9dcafc) at kernel/qobject.cpp:1082
#14 0xb6fc2c77 in QGraphicsWidget::event (this=0xa019568, event=0xbf9dcafc) at graphicsview/qgraphicswidget.cpp:1317
#15 0xb693fe9c in QApplicationPrivate::notify_helper (this=0x9d27f20, receiver=0xa019568, e=0xbf9dcafc) at kernel/qapplication.cpp:4084
#16 0xb694819e in QApplication::notify (this=0x9cf4f98, receiver=0xa019568, e=0xbf9dcafc) at kernel/qapplication.cpp:3631
#17 0xb747a5cd in KApplication::notify (this=0x9cf4f98, receiver=0xa019568, event=0xbf9dcafc) at /build/buildd/kde4libs-4.2.98a/kdeui/kernel/kapplication.cpp:302
#18 0xb7eb2a3b in QCoreApplication::notifyInternal (this=0x9cf4f98, receiver=0xa019568, event=0xbf9dcafc) at kernel/qcoreapplication.cpp:602
#19 0xb7ee1d71 in QTimerInfoList::activateTimers (this=0x9d2a884) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:213
#20 0xb7ede4e0 in timerSourceDispatch (source=0x9d2a850) at kernel/qeventdispatcher_glib.cpp:164
#21 0xb64d2b88 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#22 0xb64d60eb in ?? () from /usr/lib/libglib-2.0.so.0
#23 0xb64d6268 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#24 0xb7ede438 in QEventDispatcherGlib::processEvents (this=0x9d27ce0, flags={i = -1080177544}) at kernel/qeventdispatcher_glib.cpp:323
#25 0xb69e1365 in QGuiEventDispatcherGlib::processEvents (this=0x9d27ce0, flags={i = -1080177496}) at kernel/qguieventdispatcher_glib.cpp:202
#26 0xb7eb106a in QEventLoop::processEvents (this=0xbf9dcd20, flags={i = -1080177432}) at kernel/qeventloop.cpp:149
#27 0xb7eb14aa in QEventLoop::exec (this=0xbf9dcd20, flags={i = -1080177368}) at kernel/qeventloop.cpp:200
#28 0xb7eb3959 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:880
#29 0xb693fd17 in QApplication::exec () at kernel/qapplication.cpp:3553
#30 0xb3b8c5d0 in kdemain (argc=1, argv=0x9d05ab8) at /build/buildd/kdebase-workspace-4.2.98/plasma/shells/desktop/main.cpp:50
#31 0x0804e27d in launch (argc=1, _name=0x9c9b57c "/usr/bin/plasma-desktop", args=0x9c9b594 "", cwd=0x0, envc=0, envs=0x9c9b598 "", reset_env=false, tty=0x0, avoid_loops=false, 
    startup_id_str=0x8051391 "0") at /build/buildd/kde4libs-4.2.98a/kinit/kinit.cpp:676
#32 0x0804ea5d in handle_launcher_request (sock=7, who=<value optimized out>) at /build/buildd/kde4libs-4.2.98a/kinit/kinit.cpp:1168
#33 0x0804efe5 in handle_requests (waitForPid=0) at /build/buildd/kde4libs-4.2.98a/kinit/kinit.cpp:1361
#34 0x0804fbca in main (argc=2, argv=0xbf9dd514, envp=0xbf9dd520) at /build/buildd/kde4libs-4.2.98a/kinit/kinit.cpp:1788

Reported using DrKonqi