Gwenview crashes in kde 4.8.4 just opening gwenview, or playing a bit around it

Backtrace:
Thread 1 (Thread 0xb2703740 (LWP 4914)):
[KCrash Handler]
#7  0xb5edf506 in KSycocaDict::find_string (this=0x74890004, key=...) at /chakra/desktop-testing/kdelibs/src/kdelibs-4.8.4/kdecore/sycoca/ksycocadict.cpp:151
#8  0xb5e363ee in KMimeTypeFactory::entryOffset (this=0xb4ee68c8, mimeTypeName=...) at /chakra/desktop-testing/kdelibs/src/kdelibs-4.8.4/kdecore/services/kmimetypefactory.cpp:51
#9  0xb5e3824a in mimeTypeSycocaServiceOffers (mimeType=...) at /chakra/desktop-testing/kdelibs/src/kdelibs-4.8.4/kdecore/services/kmimetypetrader.cpp:79
#10 KMimeTypeTrader::query (this=0x899eea8, mimeType=..., genericServiceType=..., constraint=...) at /chakra/desktop-testing/kdelibs/src/kdelibs-4.8.4/kdecore/services/kmimetypetrader.cpp:147
#11 0x08086339 in Gwenview::FileOpsContextManagerItemPrivate::updateServiceForName (this=0x8738040) at /chakra/desktop-testing/kdegraphics-gwenview/src/gwenview-4.8.4/app/fileopscontextmanageritem.cpp:124
#12 0x080c0e80 in QListData::shared_null ()
#13 0x08084879 in Gwenview::FileOpsContextManagerItem::populateOpenMenu (this=0x8737fc8) at /chakra/desktop-testing/kdegraphics-gwenview/src/gwenview-4.8.4/app/fileopscontextmanageritem.cpp:412
#14 0xb712b266 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib/libQtCore.so.4
#15 0xb6579ed5 in QMenu::aboutToShow() () from /usr/lib/libQtGui.so.4
#16 0xb657de29 in QMenu::popup(QPoint const&, QAction*) () from /usr/lib/libQtGui.so.4
#17 0xb657eaff in QMenu::exec(QPoint const&, QAction*) () from /usr/lib/libQtGui.so.4
#18 0xb65c6855 in ?? () from /usr/lib/libQtGui.so.4
#19 0xb65c6e5d in ?? () from /usr/lib/libQtGui.so.4
#20 0xb65c6f6f in ?? () from /usr/lib/libQtGui.so.4
#21 0xb712b266 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib/libQtCore.so.4
#22 0xb67e77a5 in QAbstractButton::pressed() () from /usr/lib/libQtGui.so.4
#23 0xb64ee3cd in ?? () from /usr/lib/libQtGui.so.4
#24 0xb64ee5ba in QAbstractButton::mousePressEvent(QMouseEvent*) () from /usr/lib/libQtGui.so.4
#25 0xb65c7261 in QToolButton::mousePressEvent(QMouseEvent*) () from /usr/lib/libQtGui.so.4
#26 0xb6151de9 in QWidget::event(QEvent*) () from /usr/lib/libQtGui.so.4
#27 0xb64ee6f2 in QAbstractButton::event(QEvent*) () from /usr/lib/libQtGui.so.4
#28 0xb65c5a8d in QToolButton::event(QEvent*) () from /usr/lib/libQtGui.so.4
#29 0xb60f89ac in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#30 0xb60fdea2 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#31 0xb6c49e41 in KApplication::notify (this=0xbfb35e40, receiver=0x898bb50, event=0xbfb35688) at /chakra/desktop-testing/kdelibs/src/kdelibs-4.8.4/kdeui/kernel/kapplication.cpp:311
#32 0xb711308e in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#33 0xb60f9814 in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&, bool) () from /usr/lib/libQtGui.so.4
#34 0xb6181e57 in ?? () from /usr/lib/libQtGui.so.4
#35 0xb618046f in QApplication::x11ProcessEvent(_XEvent*) () from /usr/lib/libQtGui.so.4
#36 0xb61a989c in ?? () from /usr/lib/libQtGui.so.4
#37 0xb502b63a in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#38 0xb502ba45 in ?? () from /usr/lib/libglib-2.0.so.0
#39 0xb502bb21 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#40 0xb7144df1 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#41 0xb61a94aa in ?? () from /usr/lib/libQtGui.so.4
#42 0xb7111b6c in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#43 0xb7111e61 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#44 0xb71170fa in QCoreApplication::exec() () from /usr/lib/libQtCore.so.4
#45 0xb60f6814 in QApplication::exec() () from /usr/lib/libQtGui.so.4
#46 0x08066157 in main (argc=6, argv=0xbfb35f24) at /chakra/desktop-testing/kdegraphics-gwenview/src/gwenview-4.8.4/app/main.cpp:142

Reproducible: Always

Steps to Reproduce:
Just open Gwenview and play a bit around it, is quite easy to reproduce.