Application: kontact (4.4.2)
KDE Platform Version: 4.4.2 (KDE 4.4.2)
Qt Version: 4.6.2
Operating System: Linux 2.6.32-24-generic x86_64
Distribution: Ubuntu 10.04.1 LTS

-- Information about the crash:
As I want to import an RSS-Feed in Firefox, I choosed the option:
akregator
Then the application didn't wan't to start, and this BugreportingDialog was promting up.

The crash can be reproduced some of the time.

 -- Backtrace:
Application: Kontact (kontact), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f3e0f936780 (LWP 3464))]

Thread 2 (Thread 0x7f3dec454710 (LWP 3558)):
#0  0x00007f3e0ca01f83 in *__GI___poll (fds=<value optimized out>, nfds=<value optimized out>, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007f3e055364a9 in ?? () from /lib/libglib-2.0.so.0
#2  0x00007f3e055368fc in g_main_context_iteration () from /lib/libglib-2.0.so.0
#3  0x00007f3e0dded566 in QEventDispatcherGlib::processEvents (this=0x2f166b0, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:414
#4  0x00007f3e0ddc2992 in QEventLoop::processEvents (this=<value optimized out>, flags=) at kernel/qeventloop.cpp:149
#5  0x00007f3e0ddc2d6c in QEventLoop::exec (this=0x7f3dec453d90, flags=) at kernel/qeventloop.cpp:201
#6  0x00007f3e0dcccd59 in QThread::exec (this=<value optimized out>) at thread/qthread.cpp:487
#7  0x00007f3e0dda3178 in QInotifyFileSystemWatcherEngine::run (this=0x260d030) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007f3e0dccf775 in QThreadPrivate::start (arg=0x260d030) at thread/qthread_unix.cpp:248
#9  0x00007f3e07aad9ca in start_thread (arg=<value optimized out>) at pthread_create.c:300
#10 0x00007f3e0ca0e6fd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f3e0f936780 (LWP 3464)):
[KCrash Handler]
#5  0x00007f3e0ef9484a in KontactInterface::Plugin::part (this=0x2a7d3e0) at ../../kontactinterface/plugin.cpp:190
#6  0x00007f3df60c3859 in AkregatorUniqueAppHandler::newInstance (this=<value optimized out>) at ../../../../kontact/plugins/akregator/akregator_plugin.cpp:151
#7  0x00007f3e0ef960a9 in KontactInterface::UniqueAppHandler::newInstance (this=0x2a78c40, asn_id=<value optimized out>, args=...) at ../../kontactinterface/uniqueapphandler.cpp:129
#8  0x00007f3e0ef96114 in KontactInterface::UniqueAppHandler::qt_metacall (this=0x2a78c40, _c=QMetaObject::InvokeMetaMethod, _id=44553184, _a=0x7ffffa2ae230) at ./uniqueapphandler.moc:79
#9  0x00007f3e0b20f486 in QDBusConnectionPrivate::deliverCall (this=<value optimized out>, object=<value optimized out>, msg=<value optimized out>, metaTypes=..., slotIdx=<value optimized out>)
    at qdbusintegrator.cpp:904
#10 0x00007f3e0b2106ef in QDBusConnectionPrivate::activateCall (this=<value optimized out>, object=0x2a78c40, flags=272, msg=...) at qdbusintegrator.cpp:809
#11 0x00007f3e0b210f0e in QDBusConnectionPrivate::activateObject (this=<value optimized out>, node=<value optimized out>, msg=..., pathStartPos=<value optimized out>) at qdbusintegrator.cpp:1383
#12 0x00007f3e0b211468 in QDBusActivateObjectEvent::placeMetaCall (this=0x2bf20b0) at qdbusintegrator.cpp:1477
#13 0x00007f3e0ddd3d49 in QObject::event (this=0x2a78c40, e=0x2bf20b0) at kernel/qobject.cpp:1248
#14 0x00007f3e0d17d22c in QApplicationPrivate::notify_helper (this=0x25c09e0, receiver=0x2a78c40, e=0x2bf20b0) at kernel/qapplication.cpp:4300
#15 0x00007f3e0d1836fb in QApplication::notify (this=0x7ffffa2aefb0, receiver=0x2a78c40, e=0x2bf20b0) at kernel/qapplication.cpp:4183
#16 0x00007f3e0e7ac526 in KApplication::notify (this=0x7ffffa2aefb0, receiver=0x2a78c40, event=0x2bf20b0) at ../../kdeui/kernel/kapplication.cpp:302
#17 0x00007f3e0ddc406c in QCoreApplication::notifyInternal (this=0x7ffffa2aefb0, receiver=0x2a78c40, event=0x2bf20b0) at kernel/qcoreapplication.cpp:704
#18 0x00007f3e0ddc67e7 in QCoreApplication::sendEvent (receiver=0x0, event_type=<value optimized out>, data=0x2596620) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#19 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=<value optimized out>, data=0x2596620) at kernel/qcoreapplication.cpp:1345
#20 0x00007f3e0dded9d3 in QCoreApplication::sendPostedEvents (s=<value optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:220
#21 postEventSourceDispatch (s=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:276
#22 0x00007f3e055328c2 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#23 0x00007f3e05536748 in ?? () from /lib/libglib-2.0.so.0
#24 0x00007f3e055368fc in g_main_context_iteration () from /lib/libglib-2.0.so.0
#25 0x00007f3e0dded513 in QEventDispatcherGlib::processEvents (this=0x2595d70, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:412
#26 0x00007f3e0d22d46e in QGuiEventDispatcherGlib::processEvents (this=0x2a7d3e0, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#27 0x00007f3e0ddc2992 in QEventLoop::processEvents (this=<value optimized out>, flags=) at kernel/qeventloop.cpp:149
#28 0x00007f3e0ddc2d6c in QEventLoop::exec (this=0x7ffffa2aeef0, flags=) at kernel/qeventloop.cpp:201
#29 0x00007f3e0ddc6aab in QCoreApplication::exec () at kernel/qcoreapplication.cpp:981
#30 0x0000000000403e8e in main (argc=<value optimized out>, argv=<value optimized out>) at ../../../kontact/src/main.cpp:224

Reported using DrKonqi