Application: kmail (1.13.1)
KDE Platform Version: 4.4.1 (KDE 4.4.1)
Qt Version: 4.6.2
Operating System: Linux 2.6.32.9-70.fc12.x86_64 x86_64
Distribution (Platform): Fedora RPMs

-- Information about the crash:
While try to open Preference, it crashed,
Even try to create Filter, then also it crashed and not able to open it

The crash can be reproduced every time.

 -- Backtrace:
Application: ਕੇਮੇਲ (kmail), signal: Segmentation fault
82	T_PSEUDO (SYSCALL_SYMBOL, SYSCALL_NAME, SYSCALL_NARGS)
[KCrash Handler]
#5  0x00000033c2be236a in QTextEngine::boundingBox (this=0x7fffea1e28f0, from=<value optimized out>, len=-832) at text/qtextengine.cpp:1654
#6  0x00000033c2bbd043 in QFontMetrics::boundingRect (this=<value optimized out>, text=...) at text/qfontmetrics.cpp:664
#7  0x00000033c2d48036 in QComboBoxPrivate::recomputeSizeHint (this=0x1b80bc0, sh=...) at widgets/qcombobox.cpp:299
#8  0x00000033c2d48254 in QComboBox::sizeHint (this=<value optimized out>) at widgets/qcombobox.cpp:2282
#9  0x00000033c29d8ca9 in QWidgetItemV2::updateCacheIfNecessary (this=0x1b7b900) at kernel/qlayoutitem.cpp:702
#10 0x00000033c29d9388 in QWidgetItemV2::maximumSize (this=0x1b7b900) at kernel/qlayoutitem.cpp:790
#11 0x00000033c29b9223 in QBoxLayoutPrivate::setupGeom (this=0x1b7ce20) at kernel/qboxlayout.cpp:304
#12 0x00000033c29ba130 in QBoxLayout::maximumSize (this=0x1b7fe50) at kernel/qboxlayout.cpp:697
#13 0x00000033c29b9223 in QBoxLayoutPrivate::setupGeom (this=0x1b7b1e0) at kernel/qboxlayout.cpp:304
#14 0x00000033c29b9f25 in QBoxLayout::setGeometry (this=<value optimized out>, r=<value optimized out>) at kernel/qboxlayout.cpp:817
#15 0x00000033c29d6043 in QLayoutPrivate::doResize (this=0x1b7b1e0, r=...) at kernel/qlayout.cpp:681
#16 0x00000033c29d61a0 in QLayout::activate (this=0x1b7fda0) at kernel/qlayout.cpp:1259
#17 0x00000033c29fbf70 in QWidget::setVisible (this=0x1b7f1c0, visible=<value optimized out>) at kernel/qwidget.cpp:7385
#18 0x00000033c29e123d in show (this=0x1b7baa0, index=0) at ../../src/gui/kernel/qwidget.h:485
#19 QStackedLayout::setCurrentIndex (this=0x1b7baa0, index=0) at kernel/qstackedlayout.cpp:311
#20 0x00000033c29e1a5a in QStackedLayout::insertWidget (this=0x1b7baa0, index=<value optimized out>, widget=0x1b7f1c0) at kernel/qstackedlayout.cpp:219
#21 0x00000033c2dd6331 in QTabWidget::insertTab (this=0x1b7ee50, index=<value optimized out>, w=<value optimized out>, icon=..., label=...) at widgets/qtabwidget.cpp:455
#22 0x00000033c2dd63d5 in QTabWidget::insertTab (this=0x1b7ee50, index=-1, w=0x1b7f1c0, label=...) at widgets/qtabwidget.cpp:435
#23 0x00007f5899ac742d in ConfigModuleWithTabs::addTab(ConfigModuleTab*, QString const&) () from /usr/lib64/libkmailprivate.so.4
#24 0x00007f5899ab1c26 in AppearancePage::AppearancePage(KComponentData const&, QWidget*) () from /usr/lib64/libkmailprivate.so.4
#25 0x00007f58850c7677 in create_kmail_config_appearance () from /usr/lib64/kde4/kcm_kmail.so
#26 0x0000003887a23184 in KCModuleLoader::loadModule(KCModuleInfo const&, KCModuleLoader::ErrorReporting, QWidget*, QStringList const&) () from /usr/lib64/libkutils.so.4
#27 0x0000003887a27179 in ?? () from /usr/lib64/libkutils.so.4
#28 0x0000003887a27ca5 in KCModuleProxy::realModule() const () from /usr/lib64/libkutils.so.4
#29 0x0000003887a27d29 in KCModuleProxy::useRootOnlyMessage() const () from /usr/lib64/libkutils.so.4
#30 0x0000003887a24c0e in KCMultiDialog::addModule(KCModuleInfo const&, KPageWidgetItem*, QStringList const&) () from /usr/lib64/libkutils.so.4
#31 0x0000003887a2587e in KCMultiDialog::addModule(QString const&, QStringList const&) () from /usr/lib64/libkutils.so.4
#32 0x00007f5899a9ee19 in ?? () from /usr/lib64/libkmailprivate.so.4
#33 0x00007f5899c2b709 in KMKernel::slotShowConfigurationDialog() () from /usr/lib64/libkmailprivate.so.4
#34 0x00007f5899c38786 in KMKernel::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib64/libkmailprivate.so.4
#35 0x00000033c116a2af in QMetaObject::activate (sender=0x143c400, m=<value optimized out>, local_signal_index=<value optimized out>, argv=0x7fffea1e4670) at kernel/qobject.cpp:3293
#36 0x00000033c29a5b52 in QAction::triggered (this=<value optimized out>, _t1=false) at .moc/release-shared/moc_qaction.cpp:263
#37 0x00000033c29a728b in QAction::activate (this=0x143c400, event=<value optimized out>) at kernel/qaction.cpp:1255
#38 0x00000033c2da9e45 in QMenuPrivate::activateCausedStack (this=<value optimized out>, causedStack=..., action=0x143c400, action_e=Trigger, self=true) at widgets/qmenu.cpp:1011
#39 0x00000033c2daf5fa in QMenuPrivate::activateAction (this=0x153c170, action=0x143c400, action_e=Trigger, self=<value optimized out>) at widgets/qmenu.cpp:1103
#40 0x0000003885ecfd3e in KMenu::mouseReleaseEvent(QMouseEvent*) () from /usr/lib64/libkdeui.so.5
#41 0x00000033c29f5b3a in QWidget::event (this=0x1537ab0, event=0x7fffea1e52c0) at kernel/qwidget.cpp:7998
#42 0x00000033c2db0bab in QMenu::event (this=0x1537ab0, e=0x7fffea1e52c0) at widgets/qmenu.cpp:2414
#43 0x00000033c29aa9dc in QApplicationPrivate::notify_helper (this=0xce0730, receiver=0x1537ab0, e=0x7fffea1e52c0) at kernel/qapplication.cpp:4300
#44 0x00000033c29b127d in QApplication::notify (this=<value optimized out>, receiver=0x1537ab0, e=0x7fffea1e52c0) at kernel/qapplication.cpp:3865
#45 0x0000003885e06846 in KApplication::notify(QObject*, QEvent*) () from /usr/lib64/libkdeui.so.5
#46 0x00000033c115774c in QCoreApplication::notifyInternal (this=0x7fffea1e60e0, receiver=0x1537ab0, event=0x7fffea1e52c0) at kernel/qcoreapplication.cpp:704
#47 0x00000033c29b046e in sendEvent (receiver=0x1537ab0, event=0x7fffea1e52c0, alienWidget=0x0, nativeWidget=0x1537ab0, buttonDown=<value optimized out>, lastMouseReceiver=<value optimized out>, 
    spontaneous=true) at ../../src/corelib/kernel/qcoreapplication.h:215
#48 QApplicationPrivate::sendMouseEvent (receiver=0x1537ab0, event=0x7fffea1e52c0, alienWidget=0x0, nativeWidget=0x1537ab0, buttonDown=<value optimized out>, lastMouseReceiver=<value optimized out>, 
    spontaneous=true) at kernel/qapplication.cpp:2965
#49 0x00000033c2a22845 in QETWidget::translateMouseEvent (this=0x1537ab0, event=<value optimized out>) at kernel/qapplication_x11.cpp:4302
#50 0x00000033c2a21128 in QApplication::x11ProcessEvent (this=<value optimized out>, event=0x7fffea1e5be0) at kernel/qapplication_x11.cpp:3501
#51 0x00000033c2a49d52 in x11EventSourceDispatch (s=0xce40d0, callback=<value optimized out>, user_data=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:146
#52 0x000000390e43920e in g_main_dispatch (context=0xce3120) at gmain.c:1960
#53 IA__g_main_context_dispatch (context=0xce3120) at gmain.c:2513
#54 0x000000390e43cbf8 in g_main_context_iterate (context=0xce3120, block=<value optimized out>, dispatch=<value optimized out>, self=<value optimized out>) at gmain.c:2591
#55 0x000000390e43cd1a in IA__g_main_context_iteration (context=0xce3120, may_block=1) at gmain.c:2654
#56 0x00000033c117d063 in QEventDispatcherGlib::processEvents (this=0xc9fc30, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:412
#57 0x00000033c2a49a1e in QGuiEventDispatcherGlib::processEvents (this=<value optimized out>, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#58 0x00000033c1156192 in QEventLoop::processEvents (this=<value optimized out>, flags=...) at kernel/qeventloop.cpp:149
#59 0x00000033c115645c in QEventLoop::exec (this=0x7fffea1e5f10, flags=...) at kernel/qeventloop.cpp:201
#60 0x00000033c1158749 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:981
#61 0x00000000004032d2 in _start ()

Reported using DrKonqi