Version:            (using KDE 4.2.2)
OS:                Linux
Installed from:    Ubuntu Packages

I was installing a new font, and then it crashed. Here is the backtrace;

Application: System Settings (systemsettings), signal SIGSEGV
[Current thread is 0 (LWP 4024)]

Thread 2 (Thread 0xb3fe8b90 (LWP 4028)):
#0  0xb7f16430 in __kernel_vsyscall ()
#1  0xb66a77b1 in select () from /lib/tls/i686/cmov/libc.so.6
#2  0xb73c0380 in QProcessManager::run (this=0x8e9e750) at io/qprocess_unix.cpp:305
#3  0xb72ee96e in QThreadPrivate::start (arg=0x8e9e750) at thread/qthread_unix.cpp:189
#4  0xb62f94ff in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#5  0xb66af49e in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 1 (Thread 0xb5ebe700 (LWP 4024)):
[KCrash Handler]
#6  QSortFilterProxyModel::parent (this=0x92a5b58, child=@0x96145b8) at ../../include/QtCore/../../src/corelib/kernel/qabstractitemmodel.h:65
#7  0xb6f4b938 in QTreeView::indexRowSizeHint (this=0x92a23f0, index=@0x96145b8) at ../../include/QtCore/../../src/corelib/kernel/qabstractitemmodel.h:369
#8  0xb6f4c072 in QTreeViewPrivate::itemHeight (this=0x929fb88, item=0) at itemviews/qtreeview.cpp:3168
#9  0xb6f5173a in QTreeView::verticalOffset (this=0x92a23f0) at itemviews/qtreeview.cpp:2019
#10 0xb6f173a0 in QAbstractItemViewPrivate::contentsOffset (this=0x929fb88) at ../../include/QtGui/private/../../../src/gui/itemviews/qabstractitemview_p.h:273
#11 0xb69f2ada in QWidgetPrivate::drawWidget (this=0x929ffa0, pdev=0x8ef5c24, rgn=@0xbfb31970, offset=@0xbfb31940, flags=68, sharedPainter=0x0, backingStore=0x8ef5ac0) at kernel/qwidget.cpp:5019
#12 0xb6baf055 in QWidgetBackingStore::sync (this=0x8ef5ac0) at painting/qbackingstore.cpp:1258
#13 0xb69e2c46 in QWidgetPrivate::syncBackingStore (this=0x8ef4680) at kernel/qwidget.cpp:1603
#14 0xb69eae15 in QWidget::event (this=0x8ef4580, event=0x95c9738) at kernel/qwidget.cpp:7794
#15 0xb6de24c7 in QMainWindow::event (this=0x8ef4580, event=0x95c9738) at widgets/qmainwindow.cpp:1396
#16 0xb7a15327 in KMainWindow::event (this=0x8ef4580, ev=0x95c9738) at /build/buildd/kde4libs-4.2.2/kdeui/widgets/kmainwindow.cpp:1094
#17 0xb7a5a10c in KXmlGuiWindow::event (this=0x8ef4580, ev=0x95c9738) at /build/buildd/kde4libs-4.2.2/kdeui/xmlgui/kxmlguiwindow.cpp:131
#18 0xb6993f2c in QApplicationPrivate::notify_helper (this=0x8eab168, receiver=0x8ef4580, e=0x95c9738) at kernel/qapplication.cpp:4084
#19 0xb699c312 in QApplication::notify (this=0xbfb32284, receiver=0x8ef4580, e=0x95c9738) at kernel/qapplication.cpp:4049
#20 0xb793194d in KApplication::notify (this=0xbfb32284, receiver=0x8ef4580, event=0x95c9738) at /build/buildd/kde4libs-4.2.2/kdeui/kernel/kapplication.cpp:307
#21 0xb73e2a3b in QCoreApplication::notifyInternal (this=0xbfb32284, receiver=0x8ef4580, event=0x95c9738) at kernel/qcoreapplication.cpp:602
#22 0xb73e3695 in QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x8e7fb38) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:213
#23 0xb73e388d in QCoreApplication::sendPostedEvents (receiver=0x0, event_type=0) at kernel/qcoreapplication.cpp:1132
#24 0xb740e7ef in postEventSourceDispatch (s=0x8e9e498) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:218
#25 0xb6228b88 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#26 0xb622c0eb in ?? () from /usr/lib/libglib-2.0.so.0
#27 0xb622c268 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#28 0xb740e438 in QEventDispatcherGlib::processEvents (this=0x8e83138, flags={i = -1078779544}) at kernel/qeventdispatcher_glib.cpp:323
#29 0xb6a353f5 in QGuiEventDispatcherGlib::processEvents (this=0x8e83138, flags={i = -1078779496}) at kernel/qguieventdispatcher_glib.cpp:202
#30 0xb73e106a in QEventLoop::processEvents (this=0xbfb32210, flags={i = -1078779432}) at kernel/qeventloop.cpp:149
#31 0xb73e14aa in QEventLoop::exec (this=0xbfb32210, flags={i = -1078779368}) at kernel/qeventloop.cpp:200
#32 0xb73e3959 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:880
#33 0xb6993da7 in QApplication::exec () at kernel/qapplication.cpp:3553
#34 0x08056c3b in _start ()