Application that crashed: plasma-desktop
Version of the application: 0.3
KDE Version: 4.3.1 (KDE 4.3.1)
Qt Version: 4.5.2
Operating System: Linux 2.6.28-15-generic i686
Distribution: Ubuntu 9.04

What I was doing when the application crashed:
I was just browsing the web (using opera), and plasma crashed unexpectedly.

 -- Backtrace:
Application: Plasma Workspace (kdeinit4), signal: Segmentation fault
[Current thread is 0 (LWP 4977)]

Thread 2 (Thread 0xa9411b90 (LWP 4980)):
#0  0xb8032430 in __kernel_vsyscall ()
#1  0xb65440e5 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/tls/i686/cmov/libpthread.so.0
#2  0xb67242ed in pthread_cond_wait () from /lib/tls/i686/cmov/libc.so.6
#3  0xb7e2a172 in QWaitCondition::wait (this=0x924d1c8, mutex=0x924d1c4, time=4294967295) at thread/qwaitcondition_unix.cpp:87
#4  0xb7767ac2 in QHostInfoAgent::run (this=0x924d1b8) at kernel/qhostinfo.cpp:260
#5  0xb7e29132 in QThreadPrivate::start (arg=0x924d1b8) at thread/qthread_unix.cpp:188
#6  0xb65404ff in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#7  0xb671549e in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 1 (Thread 0xb604da10 (LWP 4977)):
[KCrash Handler]
#6  AbstractTaskItem::basicPreferredSize (this=0xa0d0ae0) at /build/buildd/kdebase-workspace-4.3.1/plasma/applets/tasks/tasks.h:92
#7  0xa960f74c in TaskItemLayout::maximumRows (this=0x8fd5068) at /build/buildd/kdebase-workspace-4.3.1/plasma/applets/tasks/taskitemlayout.cpp:185
#8  0xa9618ef4 in TaskGroupItem::optimumCapacity (this=0x9170f40) at /build/buildd/kdebase-workspace-4.3.1/plasma/applets/tasks/taskgroupitem.cpp:1224
#9  0xa960a508 in Tasks::adjustGroupingStrategy (this=0x8fd81e0) at /build/buildd/kdebase-workspace-4.3.1/plasma/applets/tasks/tasks.cpp:241
#10 0xa960a79c in Tasks::constraintsEvent (this=0x8fd81e0, constraints={i = -1081806556}) at /build/buildd/kdebase-workspace-4.3.1/plasma/applets/tasks/tasks.cpp:165
#11 0xb5db5ce0 in Plasma::Applet::flushPendingConstraintsEvents (this=0x8fd81e0) at /build/buildd/kde4libs-4.3.1/plasma/applet.cpp:1173
#12 0xb5db6388 in Plasma::Applet::timerEvent (this=0x8fd81e0, event=0xbf84f61c) at /build/buildd/kde4libs-4.3.1/plasma/applet.cpp:2120
#13 0xb7f2e16f in QObject::event (this=0x8fd81e0, e=0xbf84f61c) at kernel/qobject.cpp:1075
#14 0xb7038627 in QGraphicsWidget::event (this=0x8fd81e0, event=0xbf84f61c) at graphicsview/qgraphicswidget.cpp:1340
#15 0xb69dad3c in QApplicationPrivate::notify_helper (this=0x8c640f0, receiver=0x8fd81e0, e=0xbf84f61c) at kernel/qapplication.cpp:4056
#16 0xb69e303e in QApplication::notify (this=0x8c261a0, receiver=0x8fd81e0, e=0xbf84f61c) at kernel/qapplication.cpp:3603
#17 0xb74eb85d in KApplication::notify (this=0x8c261a0, receiver=0x8fd81e0, event=0xbf84f61c) at /build/buildd/kde4libs-4.3.1/kdeui/kernel/kapplication.cpp:302
#18 0xb7f1dbcb in QCoreApplication::notifyInternal (this=0x8c261a0, receiver=0x8fd81e0, event=0xbf84f61c) at kernel/qcoreapplication.cpp:610
#19 0xb7f4cd51 in QTimerInfoList::activateTimers (this=0x8c66864) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:213
#20 0xb7f493a0 in timerSourceDispatch (source=0x8c66830) at kernel/qeventdispatcher_glib.cpp:165
#21 0xb658db88 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#22 0xb65910eb in ?? () from /usr/lib/libglib-2.0.so.0
#23 0xb6591268 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#24 0xb7f492f8 in QEventDispatcherGlib::processEvents (this=0x8c63ee0, flags={i = -1081804904}) at kernel/qeventdispatcher_glib.cpp:327
#25 0xb6a7ca75 in QGuiEventDispatcherGlib::processEvents (this=0x8c63ee0, flags={i = -1081804856}) at kernel/qguieventdispatcher_glib.cpp:202
#26 0xb7f1c1fa in QEventLoop::processEvents (this=0xbf84f840, flags={i = -1081804792}) at kernel/qeventloop.cpp:149
#27 0xb7f1c642 in QEventLoop::exec (this=0xbf84f840, flags={i = -1081804728}) at kernel/qeventloop.cpp:201
#28 0xb7f1eae9 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#29 0xb69dabb7 in QApplication::exec () at kernel/qapplication.cpp:3525
#30 0xb4b7f310 in kdemain (argc=1, argv=0x8c43a80) at /build/buildd/kdebase-workspace-4.3.1/plasma/shells/desktop/main.cpp:50
#31 0x0804e27d in launch (argc=1, _name=0x8bee57c "/usr/bin/plasma-desktop", args=0x8bee594 "", cwd=0x0, envc=0, envs=0x8bee598 "", reset_env=false, tty=0x0, avoid_loops=false, 
    startup_id_str=0x805136d "0") at /build/buildd/kde4libs-4.3.1/kinit/kinit.cpp:677
#32 0x0804ea5d in handle_launcher_request (sock=7, who=<value optimized out>) at /build/buildd/kde4libs-4.3.1/kinit/kinit.cpp:1169
#33 0x0804efe5 in handle_requests (waitForPid=0) at /build/buildd/kde4libs-4.3.1/kinit/kinit.cpp:1362
#34 0x0804fbca in main (argc=2, argv=0xbf850034, envp=0xbf850040) at /build/buildd/kde4libs-4.3.1/kinit/kinit.cpp:1793

This bug may be a duplicate of or related to bug 207796

Reported using DrKonqi