Application that crashed: plasma-desktop
Version of the application: 0.3
KDE Version: 4.3.60 (KDE 4.3.60 (KDE 4.4 >= 20090624))
Qt Version: 4.5.2
Operating System: Linux 2.6.28-gentoo-r5 i686

What I was doing when the application crashed:
As said in the title, I lanched Systemsettings via Kickoff when Plasma crashed.

 -- Backtrace:
Application: Plasma Workspace (kdeinit4), signal: Segmentation fault
[Current thread is 0 (LWP 30704)]

Thread 2 (Thread 0xa869eb90 (LWP 30708)):
#0  0xffffe424 in __kernel_vsyscall ()
#1  0xb7d51c85 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#2  0xb7dc9212 in QWaitCondition::wait () from /usr/lib/qt4/libQtCore.so.4
#3  0xb7717c1a in ?? () from /usr/lib/qt4/libQtNetwork.so.4
#4  0x0821f7c0 in ?? ()
#5  0x0821f7bc in ?? ()
#6  0xffffffff in ?? ()
#7  0xb7f53ff4 in ?? () from /usr/lib/qt4/libQtCore.so.4
#8  0xb7f53ff4 in ?? () from /usr/lib/qt4/libQtCore.so.4
#9  0x087017c8 in ?? ()
#10 0xa869e2f8 in ?? ()
#11 0x00000000 in ?? ()

Thread 1 (Thread 0xb6175700 (LWP 30704)):
[KCrash Handler]
#6  0xa8776ecc in Tasks::itemTopMargin (this=0x0) at /home/loacoon/Documents/Downloads/SVN/KDE4/KDE/kdebase/workspace/plasma/applets/tasks/tasks.h:92
#7  0xa8775cc2 in AbstractTaskItem::basicPreferredSize (this=0x815a688) at /home/loacoon/Documents/Downloads/SVN/KDE4/KDE/kdebase/workspace/plasma/applets/tasks/abstracttaskitem.cpp:99
#8  0xa876e330 in TaskItemLayout::maximumRows (this=0x874be70) at /home/loacoon/Documents/Downloads/SVN/KDE4/KDE/kdebase/workspace/plasma/applets/tasks/taskitemlayout.cpp:185
#9  0xa8778c7f in TaskGroupItem::optimumCapacity (this=0x87486e8) at /home/loacoon/Documents/Downloads/SVN/KDE4/KDE/kdebase/workspace/plasma/applets/tasks/taskgroupitem.cpp:1198
#10 0xa8769533 in Tasks::adjustGroupingStrategy (this=0x84d64d0) at /home/loacoon/Documents/Downloads/SVN/KDE4/KDE/kdebase/workspace/plasma/applets/tasks/tasks.cpp:241
#11 0xa876a2b5 in Tasks::constraintsEvent (this=0x84d64d0, constraints={i = -1076422156}) at /home/loacoon/Documents/Downloads/SVN/KDE4/KDE/kdebase/workspace/plasma/applets/tasks/tasks.cpp:165
#12 0xb5e22c66 in Plasma::Applet::flushPendingConstraintsEvents (this=0x84d64d0) at /home/loacoon/Documents/Downloads/SVN/KDE4/KDE/kdelibs/plasma/applet.cpp:1160
#13 0xb5e22db4 in Plasma::Applet::timerEvent (this=0x84d64d0, event=0xbfd71efc) at /home/loacoon/Documents/Downloads/SVN/KDE4/KDE/kdelibs/plasma/applet.cpp:2104
#14 0xb7eb7eaf in QObject::event () from /usr/lib/qt4/libQtCore.so.4
#15 0xb7131f8f in QGraphicsWidget::event () from /usr/lib/qt4/libQtGui.so.4
#16 0xb6b696ec in QApplicationPrivate::notify_helper () from /usr/lib/qt4/libQtGui.so.4
#17 0xb6b711ae in QApplication::notify () from /usr/lib/qt4/libQtGui.so.4
#18 0xb749aba5 in KApplication::notify (this=0x809b4f8, receiver=0x84d64d0, event=0xbfd71efc) at /home/loacoon/Documents/Downloads/SVN/KDE4/KDE/kdelibs/kdeui/kernel/kapplication.cpp:302
#19 0xb7ea8c6b in QCoreApplication::notifyInternal () from /usr/lib/qt4/libQtCore.so.4
#20 0xb7ed3781 in ?? () from /usr/lib/qt4/libQtCore.so.4
#21 0x0809b4f8 in ?? ()
#22 0x084d64d0 in ?? ()
#23 0xbfd71efc in ?? ()
#24 0xbfd71ed4 in ?? ()
#25 0x0811e120 in ?? ()
#26 0xb6175700 in ?? ()
#27 0xbfd71eb8 in ?? ()
#28 0x084d64d0 in ?? ()
#29 0x0101012c in ?? ()
#30 0x08059938 in ?? ()
#31 0x000261c4 in ?? ()
#32 0x00000036 in ?? ()
#33 0x00000000 in ?? ()

Reported using DrKonqi