Application that crashed: kbluetooth4
Version of the application: 0.3
KDE Version: 4.2.90 (KDE 4.2.90 (KDE 4.3 Beta2))
Qt Version: 4.5.1
Operating System: Linux 2.6.30-8-generic i686
Distribution: Ubuntu karmic (development branch)

What I was doing when the application crashed:
I run a Dell Latitude D630, this laptop has integrated bluetooth, and a way to turn off the antenna in hardware, whenever I do so, kdebluetooth4 crashes.

Steps to reproduce:
1) run kdebluetooth4.
2) turn off antenna.

 -- Backtrace:
Application: KBluetooth4 - The KDE4 Bluetooth Framework (kbluetooth4), signal: Segmentation fault
[KCrash Handler]
#6  0x02f2eb00 in ?? ()
#7  0x003b55b6 in QDBusConnectionPrivate::activateCall (this=0x9e574f8, object=0x9f28980, flags=273, msg=@0x9f2e8d0) at qdbusintegrator.cpp:753
#8  0x003b61c4 in QDBusConnectionPrivate::activateObject (this=0x9e574f8, node=@0x9f2e8bc, msg=@0x9f2e8d0, pathStartPos=18) at qdbusintegrator.cpp:1352
#9  0x003b645a in QDBusActivateObjectEvent::placeMetaCall (this=0x9f2e890) at qdbusintegrator.cpp:1469
#10 0x07c5c29e in QObject::event (this=0xbfd78ea0, e=0x9f2e890) at kernel/qobject.cpp:1118
#11 0x07c4baab in QCoreApplication::event (this=0xbfd78ea0, e=0x9f2e890) at kernel/qcoreapplication.cpp:1434
#12 0x012034f6 in QApplication::event (this=0xbfd78ea0, e=0x9f2e890) at kernel/qapplication.cpp:2318
#13 0x011fdaa4 in QApplicationPrivate::notify_helper (this=0x9e0d3a8, receiver=0xbfd78ea0, e=0x9f2e890) at kernel/qapplication.cpp:4057
#14 0x012051dc in QApplication::notify (this=0xbfd78ea0, receiver=0xbfd78ea0, e=0x9f2e890) at kernel/qapplication.cpp:3604
#15 0x00b8602a in KApplication::notify (this=0xbfd78ea0, receiver=0xbfd78ea0, event=0x9f2e890) at ../../kdeui/kernel/kapplication.cpp:302
#16 0x07c4c17b in QCoreApplication::notifyInternal (this=0xbfd78ea0, receiver=0xbfd78ea0, event=0x9f2e890) at kernel/qcoreapplication.cpp:610
#17 0x07c4cc42 in QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x9df28b8) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:213
#18 0x07c4ce0d in QCoreApplication::sendPostedEvents (receiver=0x0, event_type=0) at kernel/qcoreapplication.cpp:1140
#19 0x07c770df in postEventSourceDispatch (s=0x9e13720) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:218
#20 0x020cfb18 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#21 0x020d30b0 in ?? () from /usr/lib/libglib-2.0.so.0
#22 0x020d31e3 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#23 0x07c76d0c in QEventDispatcherGlib::processEvents (this=0x9e0c8b0, flags={i = 37}) at kernel/qeventdispatcher_glib.cpp:324
#24 0x0129e5c5 in QGuiEventDispatcherGlib::processEvents (this=0x9e0c8b0, flags={i = 37}) at kernel/qguieventdispatcher_glib.cpp:202
#25 0x07c4a729 in QEventLoop::processEvents (this=0xbfd77e0c, flags=) at kernel/qeventloop.cpp:149
#26 0x07c4ab72 in QEventLoop::exec (this=0xbfd77e0c, flags={i = 5}) at kernel/qeventloop.cpp:200
#27 0x003b9401 in QDBusConnectionPrivate::sendWithReply (this=0x9f37ca8, message=@0xbfd77f8c, sendMode=2, timeout=-1) at qdbusintegrator.cpp:1787
#28 0x003a359b in QDBusConnection::call (this=0x9e0d1ac, message=@0x1, mode=166889856, timeout=-1) at qdbusconnection.cpp:516
#29 0x003c0b4f in QDBusAbstractInterface::callWithArgumentList (this=0x9f3a760, mode=QDBus::BlockWithGui, method=@0xbfd78104, args=@0xbfd7802c) at qdbusabstractinterface.cpp:402
#30 0x003c44ff in QDBusAbstractInterface::call (this=0x9f3a760, mode=QDBus::BlockWithGui, method=@0xbfd78104, arg1=@0xbfd780ec, arg2=@0xbfd780e0, arg3=@0xbfd780d4, arg4=@0xbfd780c8, 
    arg5=@0xbfd780bc, arg6=@0xbfd780b0, arg7=@0xbfd780a4, arg8=@0xbfd78098) at qdbusabstractinterface.cpp:655
#31 0x08066ce3 in _start ()

Reported using DrKonqi