Application that crashed: ksysguard
Version of the application: 4.2.90 (KDE 4.2.90 (KDE 4.3 Beta2))
KDE Version: 4.2.90 (KDE 4.2.90 (KDE 4.3 Beta2))
Qt Version: 4.5.1
Operating System: Linux 2.6.29.5-191.fc11.x86_64 x86_64
Distribution: "Fedora release 11 (Leonidas)"

What I was doing when the application crashed:
systemmonitor crash on close

after insert a new workspace

 -- Backtrace:
Application: Systemmonitor (ksysguard), signal: Segmentation fault
[KCrash Handler]
#5  0x0000000000000000 in ?? ()
#6  0x0000003d9925f349 in WorkSheet::~WorkSheet (this=0xe82660, __in_chrg=<value optimized out>) at /usr/src/debug/kdebase-workspace-4.2.90/ksysguard/gui/WorkSheet.cc:87
#7  0x0000003d9534dc9c in QObjectPrivate::deleteChildren() () from /usr/lib64/libQtCore.so.4
#8  0x0000003d961d9013 in QWidget::~QWidget() () from /usr/lib64/libQtGui.so.4
#9  0x0000003d965c8221 in QStackedWidget::~QStackedWidget() () from /usr/lib64/libQtGui.so.4
#10 0x0000003d9534dc9c in QObjectPrivate::deleteChildren() () from /usr/lib64/libQtCore.so.4
#11 0x0000003d961d9013 in QWidget::~QWidget() () from /usr/lib64/libQtGui.so.4
#12 0x0000003d99265743 in Workspace::~Workspace (this=0xa6f3f0, __in_chrg=<value optimized out>) at /usr/src/debug/kdebase-workspace-4.2.90/ksysguard/gui/Workspace.cc:56
#13 0x0000003d9534dc9c in QObjectPrivate::deleteChildren() () from /usr/lib64/libQtCore.so.4
#14 0x0000003d961d9013 in QWidget::~QWidget() () from /usr/lib64/libQtGui.so.4
#15 0x0000003d965c2d68 in QSplitter::~QSplitter() () from /usr/lib64/libQtGui.so.4
#16 0x0000003d9534dc9c in QObjectPrivate::deleteChildren() () from /usr/lib64/libQtCore.so.4
#17 0x0000003d961d9013 in QWidget::~QWidget() () from /usr/lib64/libQtGui.so.4
#18 0x0000003d97ee0625 in KMainWindow::~KMainWindow (this=0xa90030, __in_chrg=<value optimized out>) at /usr/src/debug/kdelibs-4.2.90/kdeui/widgets/kmainwindow.cpp:467
#19 0x0000003d9927039c in TopLevel::~TopLevel (this=0xa90030, __in_chrg=<value optimized out>, __vtt_parm=<value optimized out>)
    at /usr/src/debug/kdebase-workspace-4.2.90/ksysguard/gui/ksysguard.h:38
#20 0x0000003d9534ef5d in QObject::event(QEvent*) () from /usr/lib64/libQtCore.so.4
#21 0x0000003d961dcc9d in QWidget::event(QEvent*) () from /usr/lib64/libQtGui.so.4
#22 0x0000003d9657e02b in QMainWindow::event(QEvent*) () from /usr/lib64/libQtGui.so.4
#23 0x0000003d97f1b5f8 in KXmlGuiWindow::event (this=0xa3a490, ev=0xccf210) at /usr/src/debug/kdelibs-4.2.90/kdeui/xmlgui/kxmlguiwindow.cpp:131
#24 0x0000003d9926f56e in TopLevel::event (this=0xa90030, e=0xccf210) at /usr/src/debug/kdebase-workspace-4.2.90/ksysguard/gui/ksysguard.cc:329
#25 0x0000003d9618ea8c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib64/libQtGui.so.4
#26 0x0000003d96195e3e in QApplication::notify(QObject*, QEvent*) () from /usr/lib64/libQtGui.so.4
#27 0x0000003d97e0feb6 in KApplication::notify (this=0x915080, receiver=0xa90030, event=0xeed350) at /usr/src/debug/kdelibs-4.2.90/kdeui/kernel/kapplication.cpp:302
#28 0x0000003d9533f61c in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib64/libQtCore.so.4
#29 0x0000003d9534011a in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () from /usr/lib64/libQtCore.so.4
#30 0x0000003d95368433 in ?? () from /usr/lib64/libQtCore.so.4
#31 0x0000003d93237afe in g_main_context_dispatch () from /lib64/libglib-2.0.so.0
#32 0x0000003d9323b1d8 in ?? () from /lib64/libglib-2.0.so.0
#33 0x0000003d9323b300 in g_main_context_iteration () from /lib64/libglib-2.0.so.0
#34 0x0000003d953680a6 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4
#35 0x0000003d9622162e in ?? () from /usr/lib64/libQtGui.so.4
#36 0x0000003d9533df52 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4
#37 0x0000003d9533e324 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4
#38 0x0000003d953403c9 in QCoreApplication::exec() () from /usr/lib64/libQtCore.so.4
#39 0x0000003d9926e1a3 in kdemain (argc=<value optimized out>, argv=<value optimized out>) at /usr/src/debug/kdebase-workspace-4.2.90/ksysguard/gui/ksysguard.cc:579
#40 0x0000003baf41ea2d in __libc_start_main () from /lib64/libc.so.6
#41 0x0000000000400709 in _start ()

Reported using DrKonqi