Application that crashed: kbluetooth4
Version of the application: 0.3
KDE Version: 4.3.1 (KDE 4.3.1)
Qt Version: 4.5.2
Operating System: Linux 2.6.28-15-generic i686
Distribution: Ubuntu 9.04

What I was doing when the application crashed:
i just deactivated the wlan and bluetooth on my laptop on the hardware side und it crashed instantly

 -- Backtrace:
Application: KBluetooth4 - The KDE4 Bluetooth Framework (kbluetooth4), signal: Segmentation fault
[KCrash Handler]
#6  0x00000020 in ?? ()
#7  0xb745ed23 in QDBusConnectionPrivate::activateCall (this=0x890da58, object=0x88f5a20, flags=273, msg=@0x89ae048) at qdbusintegrator.cpp:753
#8  0xb745f5e1 in QDBusConnectionPrivate::activateObject (this=0x890da58, node=@0x89ae034, msg=@0x89ae048, pathStartPos=18) at qdbusintegrator.cpp:1370
#9  0xb745fada in QDBusActivateObjectEvent::placeMetaCall (this=0x89ae008) at qdbusintegrator.cpp:1464
#10 0xb73573b0 in QObject::event (this=0xbf9f4b50, e=0x89ae008) at kernel/qobject.cpp:1111
#11 0xb734656b in QCoreApplication::event (this=0xbf9f4b50, e=0x89ae008) at kernel/qcoreapplication.cpp:1434
#12 0xb6984679 in QApplication::event (this=0xbf9f4b50, e=0x89ae008) at kernel/qapplication.cpp:2317
#13 0xb697ed3c in QApplicationPrivate::notify_helper (this=0x88a39d0, receiver=0xbf9f4b50, e=0x89ae008) at kernel/qapplication.cpp:4056
#14 0xb698703e in QApplication::notify (this=0xbf9f4b50, receiver=0xbf9f4b50, e=0x89ae008) at kernel/qapplication.cpp:3603
#15 0xb7b8b85d in KApplication::notify (this=0xbf9f4b50, receiver=0xbf9f4b50, event=0x89ae008) at /build/buildd/kde4libs-4.3.1/kdeui/kernel/kapplication.cpp:302
#16 0xb7346bcb in QCoreApplication::notifyInternal (this=0xbf9f4b50, receiver=0xbf9f4b50, event=0x89ae008) at kernel/qcoreapplication.cpp:610
#17 0xb7347825 in QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x8884b38) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:213
#18 0xb7347a1d in QCoreApplication::sendPostedEvents (receiver=0x0, event_type=0) at kernel/qcoreapplication.cpp:1140
#19 0xb73726af in postEventSourceDispatch (s=0x88a5b10) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:218
#20 0xb62c4b88 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#21 0xb62c80eb in ?? () from /usr/lib/libglib-2.0.so.0
#22 0xb62c8268 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#23 0xb73722f8 in QEventDispatcherGlib::processEvents (this=0x8884d10, flags={i = -1080083816}) at kernel/qeventdispatcher_glib.cpp:327
#24 0xb6a20a75 in QGuiEventDispatcherGlib::processEvents (this=0x8884d10, flags={i = -1080083768}) at kernel/qguieventdispatcher_glib.cpp:202
#25 0xb73451fa in QEventLoop::processEvents (this=0xbf9f3bc8, flags={i = -1080083704}) at kernel/qeventloop.cpp:149
#26 0xb7345642 in QEventLoop::exec (this=0xbf9f3bc8, flags={i = -1080083484}) at kernel/qeventloop.cpp:201
#27 0xb7462fcc in QDBusConnectionPrivate::sendWithReply (this=0x88f4b20, message=@0xbf9f3d38, sendMode=<value optimized out>, timeout=-1) at qdbusintegrator.cpp:1782
#28 0xb744c3c1 in QDBusConnection::call (this=0x88d2eac, message=@0xbf9f3d38, mode=QDBus::BlockWithGui, timeout=-1) at qdbusconnection.cpp:516
#29 0xb746ac6b in QDBusAbstractInterface::callWithArgumentList (this=0x89a7358, mode=QDBus::BlockWithGui, method=@0xbf9f3ee4, args=@0xbf9f3e18) at qdbusabstractinterface.cpp:402
#30 0xb746ebbd in QDBusAbstractInterface::call (this=0x89a7358, mode=QDBus::BlockWithGui, method=@0xbf9f3ee4, arg1=@0xbf9f3ecc, arg2=@0xbf9f3ec0, arg3=@0xbf9f3eb4, arg4=@0xbf9f3ea8, 
    arg5=@0xbf9f3e9c, arg6=@0xbf9f3e90, arg7=@0xbf9f3e84, arg8=@0xbf9f3e78) at qdbusabstractinterface.cpp:655
#31 0x08066ce3 in _start ()

Reported using DrKonqi