Reassigning to KOrganizer, as it looks like it's its fault.

More details: this crash happens when KOrganizer's view is set to 'To-do' list, so the calendar view is disabled.

More detailed backtrace:

Application: Ark (ark), signal: Segmentation fault
[Current thread is 1 (Thread 0xb5217960 (LWP 8031))]

Thread 2 (Thread 0xb2ee4b70 (LWP 8033)):
#0  0xb76e3424 in __kernel_vsyscall ()  
#1  0xb5ad89b1 in select () from /lib/libc.so.6
#2  0xb5e0dfcf in QProcessManager::run (this=0xb5f4a710) at /home/kubo/kde4/src/qt-copy/src/corelib/io/qprocess_unix.cpp:245
#3  0xb5d31d3e in QThreadPrivate::start (arg=0xb5f4a710) at /home/kubo/kde4/src/qt-copy/src/corelib/thread/qthread_unix.cpp:244
#4  0xb5c978ac in start_thread () from /lib/libpthread.so.0                                                                    
#5  0xb5adfa9e in clone () from /lib/libc.so.6                                                                                 

Thread 1 (Thread 0xb5217960 (LWP 8031)):
[KCrash Handler]                        
#6  0x03000020 in ?? ()                 
#7  0xb60f3e23 in QWidget::ensurePolished (this=0x97ea828) at /home/kubo/kde4/src/qt-copy/src/gui/kernel/qwidget.cpp:9295
#8  0xb6558882 in QSplitter::sizes (this=0x97ea828) at /home/kubo/kde4/src/qt-copy/src/gui/widgets/qsplitter.cpp:1627    
#9  0xb221d9da in CalendarView::writeSettings (this=0x97e9b20) at /home/kubo/kde4/src/kdepim/korganizer/calendarview.cpp:487
#10 0xb2286984 in ActionManager::writeSettings (this=0x98c0210) at /home/kubo/kde4/src/kdepim/korganizer/actionmanager.cpp:731
#11 0xb24ba3df in ~KOrganizerPart (this=0x97e93b8, __in_chrg=<value optimized out>, __vtt_parm=<value optimized out>) at /home/kubo/kde4/src/kdepim/korganizer/korganizer_part.cpp:103
#12 0xb75cd5cc in KParts::Part::slotWidgetDestroyed (this=0x97e93b8) at /home/kubo/kde4/src/kdelibs/kparts/part.cpp:354                                                               
#13 0xb75cd67b in KParts::Part::qt_metacall (this=0x97e93b8, _c=QMetaObject::InvokeMetaMethod, _id=6, _a=0xbfe0de28) at /home/kubo/kde4/src/build/kdelibs/kparts/part.moc:82          
#14 0xb75cd6ca in KParts::ReadOnlyPart::qt_metacall (this=0x97e93b8, _c=QMetaObject::InvokeMetaMethod, _id=6, _a=0xbfe0de28) at /home/kubo/kde4/src/build/kdelibs/kparts/part.moc:166 
#15 0xb24ba13a in KOrganizerPart::qt_metacall (this=0x97e93b8, _c=QMetaObject::InvokeMetaMethod, _id=6, _a=0xbfe0de28) at /home/kubo/kde4/src/build/kdepim/korganizer/korganizer_part.moc:75
#16 0xb5e37d0a in QMetaObject::metacall (object=0x97e93b8, cl=QMetaObject::InvokeMetaMethod, idx=6, argv=0xbfe0de28) at /home/kubo/kde4/src/qt-copy/src/corelib/kernel/qmetaobject.cpp:237  
#17 0xb5e462eb in QMetaObject::activate (sender=0x94106d8, m=0xb5f42790, local_signal_index=0, argv=0xbfe0de28) at /home/kubo/kde4/src/qt-copy/src/corelib/kernel/qobject.cpp:3274          
#18 0xb5e46783 in QObject::destroyed (this=0x94106d8, _t1=0x94106d8) at .moc/release-shared/moc_qobject.cpp:149                                                                             
#19 0xb5e48f3a in ~QObject (this=0x94106d8, __in_chrg=<value optimized out>) at /home/kubo/kde4/src/qt-copy/src/corelib/kernel/qobject.cpp:869                                              
#20 0xb6105a8e in ~QWidget (this=0x94106d8, __in_chrg=<value optimized out>) at /home/kubo/kde4/src/qt-copy/src/gui/kernel/qwidget.cpp:1475                                                 
#21 0xb5e420ff in QObjectPrivate::deleteChildren (this=0x97d89f8) at /home/kubo/kde4/src/qt-copy/src/corelib/kernel/qobject.cpp:1978                                                        
#22 0xb6106487 in ~QWidget (this=0x97adc08, __in_chrg=<value optimized out>) at /home/kubo/kde4/src/qt-copy/src/gui/kernel/qwidget.cpp:1459                                                 
#23 0xb64f2be1 in ~QFrame (this=0x97adc08, __in_chrg=<value optimized out>) at /home/kubo/kde4/src/qt-copy/src/gui/widgets/qframe.cpp:242                                                   
#24 0xb7163a61 in ~KHBox (this=0x97adc08, __in_chrg=<value optimized out>) at /home/kubo/kde4/src/kdelibs/kdeui/widgets/khbox.cpp:51                                                        
#25 0xb71b6955 in ~KVBox (this=0x97adc08, __in_chrg=<value optimized out>) at /home/kubo/kde4/src/kdelibs/kdeui/widgets/kvbox.cpp:29
#26 0xb5e420ff in QObjectPrivate::deleteChildren (this=0x9665228) at /home/kubo/kde4/src/qt-copy/src/corelib/kernel/qobject.cpp:1978
#27 0xb6106487 in ~QWidget (this=0xbfe0e14c, __in_chrg=<value optimized out>) at /home/kubo/kde4/src/qt-copy/src/gui/kernel/qwidget.cpp:1459
#28 0xb65d5614 in ~QDialog (this=0xbfe0e14c, __in_chrg=<value optimized out>) at /home/kubo/kde4/src/qt-copy/src/gui/dialogs/qdialog.cpp:312
#29 0xb6ff8f44 in ~KDialog (this=0xbfe0e14c, __in_chrg=<value optimized out>) at /home/kubo/kde4/src/kdelibs/kdeui/dialogs/kdialog.cpp:197
#30 0xb388a0de in ~ArkViewer (this=0xbfe0e14c, __in_chrg=<value optimized out>) at /home/kubo/kde4/src/kdeutils/ark/part/arkviewer.cpp:83
#31 0xb388a354 in ArkViewer::view (filename=..., parent=0x95a8700) at /home/kubo/kde4/src/kdeutils/ark/part/arkviewer.cpp:108
#32 0xb387dbf4 in Ark::Part::slotPreviewExtracted (this=0x95cf870, job=0x9660250) at /home/kubo/kde4/src/kdeutils/ark/part/part.cpp:502
#33 0xb387af94 in Ark::Part::qt_metacall (this=0x95cf870, _c=QMetaObject::InvokeMetaMethod, _id=26, _a=0x97ae710) at /home/kubo/kde4/src/build/kdeutils/ark/part/moc_part.cpp:132
#34 0xb5e37d0a in QMetaObject::metacall (object=0x95cf870, cl=QMetaObject::InvokeMetaMethod, idx=26, argv=0x97ae710) at /home/kubo/kde4/src/qt-copy/src/corelib/kernel/qmetaobject.cpp:237
#35 0xb5e422a6 in QMetaCallEvent::placeMetaCall (this=0x9577fb0, object=0x95cf870) at /home/kubo/kde4/src/qt-copy/src/corelib/kernel/qobject.cpp:562
#36 0xb5e432fe in QObject::event (this=0x95cf870, e=0x9577fb0) at /home/kubo/kde4/src/qt-copy/src/corelib/kernel/qobject.cpp:1240
#37 0xb60a19ac in QApplicationPrivate::notify_helper (this=0x94094d0, receiver=0x95cf870, e=0x9577fb0) at /home/kubo/kde4/src/qt-copy/src/gui/kernel/qapplication.cpp:4242
#38 0xb60a85f7 in QApplication::notify (this=0xbfe0eb24, receiver=0x95cf870, e=0x9577fb0) at /home/kubo/kde4/src/qt-copy/src/gui/kernel/qapplication.cpp:3661
#39 0xb709488b in KApplication::notify (this=0xbfe0eb24, receiver=0x95cf870, event=0x9577fb0) at /home/kubo/kde4/src/kdelibs/kdeui/kernel/kapplication.cpp:302
#40 0xb5e32afb in QCoreApplication::notifyInternal (this=0xbfe0eb24, receiver=0x95cf870, event=0x9577fb0) at /home/kubo/kde4/src/qt-copy/src/corelib/kernel/qcoreapplication.cpp:704
#41 0xb5e354d3 in QCoreApplication::sendEvent (receiver=0x0, event_type=0, data=0x93da670) at ../../include/QtCore/../../../../qt-copy/src/corelib/kernel/qcoreapplication.h:215
#42 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x93da670) at /home/kubo/kde4/src/qt-copy/src/corelib/kernel/qcoreapplication.cpp:1345
#43 0xb5e3563d in QCoreApplication::sendPostedEvents (receiver=0x0, event_type=0) at /home/kubo/kde4/src/qt-copy/src/corelib/kernel/qcoreapplication.cpp:1238
#44 0xb5e5eb6f in QCoreApplication::sendPostedEvents (s=0x940b718) at ../../include/QtCore/../../../../qt-copy/src/corelib/kernel/qcoreapplication.h:220
#45 postEventSourceDispatch (s=0x940b718) at /home/kubo/kde4/src/qt-copy/src/corelib/kernel/qeventdispatcher_glib.cpp:276
#46 0xb5571328 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#47 0xb5574ba0 in g_main_context_iterate () from /usr/lib/libglib-2.0.so.0
#48 0xb5574cd3 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#49 0xb5e5e665 in QEventDispatcherGlib::processEvents (this=0x9409490, flags=...) at /home/kubo/kde4/src/qt-copy/src/corelib/kernel/qeventdispatcher_glib.cpp:407
#50 0xb615c9d5 in QGuiEventDispatcherGlib::processEvents (this=0x9409490, flags=...) at /home/kubo/kde4/src/qt-copy/src/gui/kernel/qguieventdispatcher_glib.cpp:202
#51 0xb5e31119 in QEventLoop::processEvents (this=0xbfe0ea34, flags=) at /home/kubo/kde4/src/qt-copy/src/corelib/kernel/qeventloop.cpp:149
#52 0xb5e3156a in QEventLoop::exec (this=0xbfe0ea34, flags=...) at /home/kubo/kde4/src/qt-copy/src/corelib/kernel/qeventloop.cpp:201
#53 0xb5e356ff in QCoreApplication::exec () at /home/kubo/kde4/src/qt-copy/src/corelib/kernel/qcoreapplication.cpp:981
#54 0xb60a1a47 in QApplication::exec () at /home/kubo/kde4/src/qt-copy/src/gui/kernel/qapplication.cpp:3570
#55 0x080508cd in main (argc=2, argv=0xbfe0eec4) at /home/kubo/kde4/src/kdeutils/ark/app/main.cpp:210