Application that crashed: k3b
Version of the application: 1.66.0
KDE Version: 4.3.1 (KDE 4.3.1)
Qt Version: 4.5.2
Operating System: Linux 2.6.30-10-generic i686
Distribution: Ubuntu 9.04

What I was doing when the application crashed:
k3b crashed on startup with a blank DVD in the device.

 -- Backtrace:
Application: K3b (k3b), signal: Segmentation fault
[Current thread is 0 (LWP 28108)]

Thread 3 (Thread 0xb53feb90 (LWP 28136)):
[KCrash Handler]
#6  0x00970ae7 in K3b::Device::from4Byte () from /usr/lib/libk3bdevice.so.6
#7  0x00953b9c in K3b::Device::Device::determineSupportedWriteSpeeds () from /usr/lib/libk3bdevice.so.6
#8  0x001a3ab2 in K3b::Medium::update () from /usr/lib/libk3b.so.6
#9  0x001a4e6e in K3b::MediaCache::PollThread::run () from /usr/lib/libk3b.so.6
#10 0x08777132 in QThreadPrivate::start (arg=0x9868170) at thread/qthread_unix.cpp:188
#11 0x00f654ff in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#12 0x051dc49e in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 2 (Thread 0xb6538b90 (LWP 28166)):
#0  0x002ba422 in __kernel_vsyscall ()
#1  0x051d47b1 in select () from /lib/tls/i686/cmov/libc.so.6
#2  0x08849780 in QProcessManager::run (this=0x976c190) at io/qprocess_unix.cpp:296
#3  0x08777132 in QThreadPrivate::start (arg=0x976c190) at thread/qthread_unix.cpp:188
#4  0x00f654ff in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#5  0x051dc49e in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 1 (Thread 0xb7f2a700 (LWP 28108)):
#0  0x002ba422 in __kernel_vsyscall ()
#1  0x00f690e5 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/tls/i686/cmov/libpthread.so.0
#2  0x051eb2ed in pthread_cond_wait () from /lib/tls/i686/cmov/libc.so.6
#3  0x08778172 in QWaitCondition::wait (this=0x9758ca0, mutex=0x9758c8c, time=4294967295) at thread/qwaitcondition_unix.cpp:87
#4  0x087772d3 in QThread::wait (this=0x976c190, time=4294967295) at thread/qthread_unix.cpp:484
#5  0x0884c70e in ~QProcessManager (this=0x976c190) at io/qprocess_unix.cpp:259
#6  0x0884cc3a in ~QGlobalStaticDeleter (this=0x895fe78) at ../../include/QtCore/../../src/corelib/global/qglobal.h:1632
#7  0x05126bb9 in exit () from /lib/tls/i686/cmov/libc.so.6
#8  0x0399a13b in qt_xio_errhandler () at kernel/qapplication_x11.cpp:707
#9  0x06dd220a in KApplication::xioErrhandler (this=0xbff40c90, dpy=0x97611d8) at /build/buildd/kde4libs-4.3.1/kdeui/kernel/kapplication.cpp:408
#10 0x06dd2246 in kde_xio_errhandler (dpy=0x97611d8) at /build/buildd/kde4libs-4.3.1/kdeui/kernel/kapplication.cpp:125
#11 0x009bef22 in _XIOError (dpy=0x97611d8) at ../../src/XlibInt.c:2966
#12 0x009c6743 in process_responses (dpy=0x97611d8, wait_for_first_event=0, current_error=0x0, current_request=0) at ../../src/xcb_io.c:240
#13 0x009c70e5 in _XEventsQueued (dpy=0x97611d8, mode=2) at ../../src/xcb_io.c:256
#14 0x009af7af in XEventsQueued (dpy=0x97611d8, mode=2) at ../../src/Pending.c:44
#15 0x039d7caa in x11EventSourcePrepare (s=0x9758368, timeout=0xbff401c8) at kernel/qguieventdispatcher_glib.cpp:79
#16 0x04c8a9c0 in IA__g_main_context_prepare (context=0x9757698, priority=0xbff40238) at /build/buildd/glib2.0-2.20.1/glib/gmain.c:2134
#17 0x04c8adda in g_main_context_iterate (context=0x9757698, block=0, dispatch=1, self=0x9754fd8) at /build/buildd/glib2.0-2.20.1/glib/gmain.c:2428
#18 0x04c8b268 in IA__g_main_context_iteration (context=0x9757698, may_block=0) at /build/buildd/glib2.0-2.20.1/glib/gmain.c:2511
#19 0x088972f8 in QEventDispatcherGlib::processEvents (this=0x9733cb8, flags={i = -1074527560}) at kernel/qeventdispatcher_glib.cpp:327
#20 0x039d7a75 in QGuiEventDispatcherGlib::processEvents (this=0x9733cb8, flags={i = -1074527512}) at kernel/qguieventdispatcher_glib.cpp:202
#21 0x0886cc96 in QCoreApplication::processEvents (flags={i = -1074527468}) at kernel/qcoreapplication.cpp:803
#22 0x081605ad in ?? ()
#23 0x0816063c in ?? ()
#24 0x088811b8 in QMetaObject::activate (sender=0xbff40c90, from_signal_index=25, to_signal_index=25, argv=0xbff40410) at kernel/qobject.cpp:3113
#25 0x08881e42 in QMetaObject::activate (sender=0xbff40c90, m=0x81d1e00, local_signal_index=0, argv=0xbff40410) at kernel/qobject.cpp:3187
#26 0x08151e55 in ?? ()
#27 0x08153d15 in ?? ()
#28 0x08154268 in ?? ()
#29 0x088811b8 in QMetaObject::activate (sender=0x9858898, from_signal_index=4, to_signal_index=4, argv=0x0) at kernel/qobject.cpp:3113
#30 0x08881e42 in QMetaObject::activate (sender=0x9858898, m=0x895d908, local_signal_index=0, argv=0x0) at kernel/qobject.cpp:3187
#31 0x08886f77 in QSingleShotTimer::timeout (this=0x9858898) at .moc/release-shared/qtimer.moc:76
#32 0x0888709c in QSingleShotTimer::timerEvent (this=0x9858898) at kernel/qtimer.cpp:298
#33 0x0887c16f in QObject::event (this=0x9858898, e=0xbff409dc) at kernel/qobject.cpp:1075
#34 0x03935d3c in QApplicationPrivate::notify_helper (this=0x976c6f8, receiver=0x9858898, e=0xbff409dc) at kernel/qapplication.cpp:4056
#35 0x0393e03e in QApplication::notify (this=0xbff40c90, receiver=0x9858898, e=0xbff409dc) at kernel/qapplication.cpp:3603
#36 0x06dd285d in KApplication::notify (this=0xbff40c90, receiver=0x9858898, event=0xbff409dc) at /build/buildd/kde4libs-4.3.1/kdeui/kernel/kapplication.cpp:302
#37 0x0886bbcb in QCoreApplication::notifyInternal (this=0xbff40c90, receiver=0x9858898, event=0xbff409dc) at kernel/qcoreapplication.cpp:610
#38 0x0889ad51 in QTimerInfoList::activateTimers (this=0x9758334) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:213
#39 0x088973a0 in timerSourceDispatch (source=0x9758300) at kernel/qeventdispatcher_glib.cpp:165
#40 0x04c87b88 in IA__g_main_context_dispatch (context=0x9757698) at /build/buildd/glib2.0-2.20.1/glib/gmain.c:1814
#41 0x04c8b0eb in g_main_context_iterate (context=0x9757698, block=1, dispatch=1, self=0x9754fd8) at /build/buildd/glib2.0-2.20.1/glib/gmain.c:2448
#42 0x04c8b268 in IA__g_main_context_iteration (context=0x9757698, may_block=1) at /build/buildd/glib2.0-2.20.1/glib/gmain.c:2511
#43 0x088972f8 in QEventDispatcherGlib::processEvents (this=0x9733cb8, flags={i = -1074525352}) at kernel/qeventdispatcher_glib.cpp:327
#44 0x039d7a75 in QGuiEventDispatcherGlib::processEvents (this=0x9733cb8, flags={i = -1074525304}) at kernel/qguieventdispatcher_glib.cpp:202
#45 0x0886a1fa in QEventLoop::processEvents (this=0xbff40c00, flags={i = -1074525240}) at kernel/qeventloop.cpp:149
#46 0x0886a642 in QEventLoop::exec (this=0xbff40c00, flags={i = -1074525176}) at kernel/qeventloop.cpp:201
#47 0x0886cae9 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#48 0x03935bb7 in QApplication::exec () at kernel/qapplication.cpp:3525
#49 0x0816f9b8 in ?? ()
#50 0x0510e775 in __libc_start_main () from /lib/tls/i686/cmov/libc.so.6
#51 0x080809c1 in _start ()

Reported using DrKonqi