Application that crashed: plasma-desktop
Version of the application: 0.3
KDE Version: 4.2.90 (KDE 4.2.90 (KDE 4.3 Beta2)) "release 1"
Qt Version: 4.5.2
Operating System: Linux 2.6.30-rc6-git3-4-default x86_64
Distribution: "openSUSE 11.2 Milestone 3 (x86_64)"

What I was doing when the application crashed:
Crash occured when clicking close (x) in firefox history window, no other ill effects occured. I have just updated to kde 4.2.90 and qt 4.5.2 and my system is opensuse factory.
I have also uploaded bug info to 185468 .

 -- Backtrace:
Application: Plasma Workspace (kdeinit), signal: Floating point exception
[Current thread is 1 (Thread 0x7fcaf0648760 (LWP 19008))]

Thread 2 (Thread 0x7fcad0fcf910 (LWP 19010)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:261
#1  0x00007fcaf009750b in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib64/libQtCore.so.4
#2  0x00007fcaec57977c in ?? () from /usr/lib64/libQtNetwork.so.4
#3  0x00007fcaf0096455 in ?? () from /usr/lib64/libQtCore.so.4
#4  0x00007fcaefe2263d in start_thread (arg=<value optimized out>) at pthread_create.c:297
#5  0x00007fcaed83db6d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#6  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7fcaf0648760 (LWP 19008)):
[KCrash Handler]
#5  0x00007fcae7d876f0 in Plasma::Animator::timerEvent(QTimerEvent*) () from /usr/lib64/libplasma.so.3
#6  0x00007fcaf018b913 in QObject::event(QEvent*) () from /usr/lib64/libQtCore.so.4
#7  0x00007fcaedf7331c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib64/libQtGui.so.4
#8  0x00007fcaedf7a5ee in QApplication::notify(QObject*, QEvent*) () from /usr/lib64/libQtGui.so.4
#9  0x00007fcaeeb6cfb6 in KApplication::notify(QObject*, QEvent*) () from /usr/lib64/libkdeui.so.5
#10 0x00007fcaf017c7bc in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib64/libQtCore.so.4
#11 0x00007fcaf01a7f0d in ?? () from /usr/lib64/libQtCore.so.4
#12 0x00007fcaf01a4dfd in ?? () from /usr/lib64/libQtCore.so.4
#13 0x00007fcaecebdbce in g_main_context_dispatch () from /usr/lib64/libglib-2.0.so.0
#14 0x00007fcaecec12a8 in ?? () from /usr/lib64/libglib-2.0.so.0
#15 0x00007fcaecec13d0 in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#16 0x00007fcaf01a4d46 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4
#17 0x00007fcaee0062ae in ?? () from /usr/lib64/libQtGui.so.4
#18 0x00007fcaf017b0c2 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4
#19 0x00007fcaf017b494 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4
#20 0x00007fcaf017d649 in QCoreApplication::exec() () from /usr/lib64/libQtCore.so.4
#21 0x00007fcae4782d1f in kdemain () from /usr/lib64/libkdeinit4_plasma-desktop.so
#22 0x0000000000406d93 in _start ()

Reported using DrKonqi