I am not very sure, but it started happening once I upgraded my browser to Firefox 16.2 Firefox upgrade required many other upgradation like Xul-runner etc.

Application: KNotify (knotify4), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f3d5ea09840 (LWP 19269))]

Thread 2 (Thread 0x7f3d53a3b700 (LWP 19271)):
#0  0x00000033daee6443 in poll () from /lib64/libc.so.6
#1  0x00000033dce44f88 in ?? () from /lib64/libglib-2.0.so.0
#2  0x00000033dce4544c in g_main_context_iteration () from /lib64/libglib-2.0.so.0
#3  0x00000030d15a6896 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4
#4  0x00000030d1576c82 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4
#5  0x00000030d1576ed7 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4
#6  0x00000030d1478ad7 in QThread::exec() () from /usr/lib64/libQtCore.so.4
#7  0x00000030d147bb1b in ?? () from /usr/lib64/libQtCore.so.4
#8  0x00000033db607d90 in start_thread () from /lib64/libpthread.so.0
#9  0x00000033daeeeddd in clone () from /lib64/libc.so.6

Thread 1 (Thread 0x7f3d5ea09840 (LWP 19269)):
[KCrash Handler]
#6  0x0000003c7ec8eb81 in Herqq::Upnp::HServiceInfo::eventSubUrl() const () from /usr/lib64/libHUpnp.so.1
#7  0x0000003c7ecb8bcc in Herqq::Upnp::HEventSubscription::renewSubscription() () from /usr/lib64/libHUpnp.so.1
#8  0x0000003c7ecb9788 in Herqq::Upnp::HEventSubscription::runNextOp() () from /usr/lib64/libHUpnp.so.1
#9  0x0000003c7ecb9802 in Herqq::Upnp::HEventSubscription::connected() () from /usr/lib64/libHUpnp.so.1
#10 0x0000003c7ece032c in Herqq::Upnp::HEventSubscription::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib64/libHUpnp.so.1
#11 0x00000030d158b9cd in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib64/libQtCore.so.4
#12 0x0000003c7bcc9bed in ?? () from /usr/lib64/libQtNetwork.so.4
#13 0x0000003c7bccb048 in ?? () from /usr/lib64/libQtNetwork.so.4
#14 0x0000003c7bcd5735 in ?? () from /usr/lib64/libQtNetwork.so.4
#15 0x00000030d2dc96f4 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib64/libQtGui.so.4
#16 0x00000030d2dce573 in QApplication::notify(QObject*, QEvent*) () from /usr/lib64/libQtGui.so.4
#17 0x0000003c7cc50396 in KApplication::notify(QObject*, QEvent*) () from /usr/lib64/libkdeui.so.5
#18 0x00000030d1577b4c in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib64/libQtCore.so.4
#19 0x00000030d15a5e87 in ?? () from /usr/lib64/libQtCore.so.4
#20 0x00000033dce44a7d in g_main_context_dispatch () from /lib64/libglib-2.0.so.0
#21 0x00000033dce45278 in ?? () from /lib64/libglib-2.0.so.0
#22 0x00000033dce4544c in g_main_context_iteration () from /lib64/libglib-2.0.so.0
#23 0x00000030d15a682f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4
#24 0x00000030d2e6c43e in ?? () from /usr/lib64/libQtGui.so.4
#25 0x00000030d1576c82 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4
#26 0x00000030d1576ed7 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4
#27 0x00000030d157b8d5 in QCoreApplication::exec() () from /usr/lib64/libQtCore.so.4
#28 0x00000000004097c7 in ?? ()
#29 0x00000033dae2169d in __libc_start_main () from /lib64/libc.so.6
#30 0x00000000004098a5 in _start ()


Reproducible: Always

Steps to Reproduce:
1. Keep dolphin open for sometime
Actual Results:  
Knotify 4 crash with SIGSEGV and Dolphin is closed.

Expected Results:  
Dolphin should keep running.