Application that crashed: plasma-desktop
Version of the application: 0.3
KDE Version: 4.3.2 (KDE 4.3.2)
Qt Version: 4.5.2
Operating System: Linux 2.6.31-17-generic i686
Distribution: Ubuntu 9.10

What I was doing when the application crashed:
crash occurs when I add/remove widgets

 -- Backtrace:
Application: Plasma Workspace (kdeinit4), signal: Segmentation fault
[Current thread is 1 (Thread 0xb7898700 (LWP 3381))]

Thread 2 (Thread 0xaaf9eb70 (LWP 3632)):
#0  0x0081a422 in __kernel_vsyscall ()
#1  0x00e0de15 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/tls/i686/cmov/libpthread.so.0
#2  0x0044687d in pthread_cond_wait () from /lib/tls/i686/cmov/libc.so.6
#3  0x00532e67 in QWaitConditionPrivate::wait (this=0x9d53c48, mutex=0x9d53c44, time=4294967295) at thread/qwaitcondition_unix.cpp:87
#4  QWaitCondition::wait (this=0x9d53c48, mutex=0x9d53c44, time=4294967295) at thread/qwaitcondition_unix.cpp:159
#5  0x05646922 in QHostInfoAgent::run (this=0x9d53c38) at kernel/qhostinfo.cpp:260
#6  0x00531e32 in QThreadPrivate::start (arg=0x9d53c38) at thread/qthread_unix.cpp:188
#7  0x00e0980e in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#8  0x004398de in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 1 (Thread 0xb7898700 (LWP 3381)):
[KCrash Handler]
#6  0x01401d27 in Plasma::Corona::popupPosition(QGraphicsItem const*, QSize const&) () from /usr/lib/libplasma.so.3
#7  0x014703ca in ?? () from /usr/lib/libplasma.so.3
#8  0x01470650 in Plasma::ToolTipManager::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libplasma.so.3
#9  0x00638263 in QMetaObject::activate (sender=0x9a4d1b0, from_signal_index=4, to_signal_index=4, argv=0x0) at kernel/qobject.cpp:3113
#10 0x00638ec2 in QMetaObject::activate (sender=0x9a4d1b0, m=0x713904, local_signal_index=0, argv=0x0) at kernel/qobject.cpp:3187
#11 0x00672667 in QTimer::timeout (this=0x9a4d1b0) at .moc/release-shared/moc_qtimer.cpp:128
#12 0x0063d9ae in QTimer::timerEvent (this=0x9a4d1b0, e=0xbfb50ca0) at kernel/qtimer.cpp:261
#13 0x006323bf in QObject::event (this=0x9a4d1b0, e=0xbfb50ca0) at kernel/qobject.cpp:1075
#14 0x028d3f54 in QApplicationPrivate::notify_helper (this=0x97d6b70, receiver=0x9a4d1b0, e=0xbfb50ca0) at kernel/qapplication.cpp:4056
#15 0x028db67c in QApplication::notify (this=0x97afd10, receiver=0x9a4d1b0, e=0xbfb50ca0) at kernel/qapplication.cpp:3603
#16 0x01101bfa in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#17 0x006226cb in QCoreApplication::notifyInternal (this=0x97afd10, receiver=0x9a4d1b0, event=0xbfb50ca0) at kernel/qcoreapplication.cpp:610
#18 0x0064f7ce in QCoreApplication::sendEvent (this=0x97d9774) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:213
#19 QTimerInfoList::activateTimers (this=0x97d9774) at kernel/qeventdispatcher_unix.cpp:572
#20 0x0064d0e0 in timerSourceDispatch (source=0x97d9740) at kernel/qeventdispatcher_glib.cpp:165
#21 0x0074ee88 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#22 0x00752730 in ?? () from /lib/libglib-2.0.so.0
#23 0x00752863 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#24 0x0064d02c in QEventDispatcherGlib::processEvents (this=0x97d6930, flags=...) at kernel/qeventdispatcher_glib.cpp:327
#25 0x02974be5 in QGuiEventDispatcherGlib::processEvents (this=0x97d6930, flags=...) at kernel/qguieventdispatcher_glib.cpp:202
#26 0x00620c79 in QEventLoop::processEvents (this=0xbfb50f64, flags=) at kernel/qeventloop.cpp:149
#27 0x006210ca in QEventLoop::exec (this=0xbfb50f64, flags=...) at kernel/qeventloop.cpp:201
#28 0x0062353f in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#29 0x028d3dd7 in QApplication::exec () at kernel/qapplication.cpp:3525
#30 0x06a6380d in kdemain () from /usr/lib/libkdeinit4_plasma-desktop.so
#31 0x0804dde1 in _start ()

Reported using DrKonqi