Application that crashed: k3b
Version of the application: 1.68.0
KDE Version: 4.3.2 (KDE 4.3.2)
Qt Version: 4.5.2
Operating System: Linux 2.6.31-19-generic x86_64
Distribution: Ubuntu 9.10

What I was doing when the application crashed:
I was trying to copy a data DVD from one drive to another. K3B never saw the write drive. I decided to cancel the copy process and find the image to write it separately after a couple of times. When I was about to actually do that, K3B crashed and vanished from the screen just as it had finished making the ISO. (It was at 100%.)

 -- Backtrace:
Application: K3b (k3b), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f23f8d8c750 (LWP 12842))]

Thread 3 (Thread 0x7f23dbfff910 (LWP 12860)):
#0  0x00007f23efd6482d in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#1  0x00007f23f2d93ed5 in ?? () from /usr/lib/libQtCore.so.4
#2  0x00007f23f2d94086 in QThread::sleep(unsigned long) () from /usr/lib/libQtCore.so.4
#3  0x00007f23f8653625 in K3b::MediaCache::PollThread::run() () from /usr/lib/libk3b.so.6
#4  0x00007f23f2d94445 in ?? () from /usr/lib/libQtCore.so.4
#5  0x00007f23efd5fa04 in start_thread () from /lib/libpthread.so.0
#6  0x00007f23f174780d in clone () from /lib/libc.so.6
#7  0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7f23db7fe910 (LWP 14353)):
[KCrash Handler]
#5  0x00007f23f89983f1 in K3b::Device::Track::firstSector() const () from /usr/lib/libk3bdevice.so.6
#6  0x00007f23f86516dc in K3b::Medium::analyseContent() () from /usr/lib/libk3b.so.6
#7  0x00007f23f8652210 in K3b::Medium::update() () from /usr/lib/libk3b.so.6
#8  0x00007f23f865359c in K3b::MediaCache::PollThread::run() () from /usr/lib/libk3b.so.6
#9  0x00007f23f2d94445 in ?? () from /usr/lib/libQtCore.so.4
#10 0x00007f23efd5fa04 in start_thread () from /lib/libpthread.so.0
#11 0x00007f23f174780d in clone () from /lib/libc.so.6
#12 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f23f8d8c750 (LWP 12842)):
#0  0x00007f23efd645a9 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#1  0x00007f23f2d93c93 in ?? () from /usr/lib/libQtCore.so.4
#2  0x00007f23f2d8f865 in QMutex::lock() () from /usr/lib/libQtCore.so.4
#3  0x00007f23f86537d1 in K3b::MediaCache::resetDevice(K3b::Device::Device*) () from /usr/lib/libk3b.so.6
#4  0x00007f23f861711f in K3b::eject(K3b::Device::Device*) () from /usr/lib/libk3b.so.6
#5  0x00007f23f8695fd4 in K3b::DvdCopyJob::slotReaderFinished(bool) () from /usr/lib/libk3b.so.6
#6  0x00007f23f8698048 in K3b::DvdCopyJob::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libk3b.so.6
#7  0x00007f23f2e8fddc in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQtCore.so.4
#8  0x00007f23f8623fa2 in K3b::Job::finished(bool) () from /usr/lib/libk3b.so.6
#9  0x00007f23f8624f74 in K3b::Job::jobFinished(bool) () from /usr/lib/libk3b.so.6
#10 0x00007f23f86265ec in K3b::ThreadJob::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libk3b.so.6
#11 0x00007f23f2e8a0f9 in QObject::event(QEvent*) () from /usr/lib/libQtCore.so.4
#12 0x00007f23f2322efc in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#13 0x00007f23f232a1ce in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#14 0x00007f23f3ce6ab6 in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#15 0x00007f23f2e7ac2c in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#16 0x00007f23f2e7b80a in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () from /usr/lib/libQtCore.so.4
#17 0x00007f23f2ea3533 in ?? () from /usr/lib/libQtCore.so.4
#18 0x00007f23edf38bce in g_main_dispatch (context=0x17b94b0) at /build/buildd/glib2.0-2.22.3/glib/gmain.c:1960
#19 IA__g_main_context_dispatch (context=0x17b94b0) at /build/buildd/glib2.0-2.22.3/glib/gmain.c:2513
#20 0x00007f23edf3c598 in g_main_context_iterate (context=0x17b94b0, block=<value optimized out>, dispatch=<value optimized out>, self=<value optimized out>)
    at /build/buildd/glib2.0-2.22.3/glib/gmain.c:2591
#21 0x00007f23edf3c6c0 in IA__g_main_context_iteration (context=0x17b94b0, may_block=1) at /build/buildd/glib2.0-2.22.3/glib/gmain.c:2654
#22 0x00007f23f2ea31a6 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#23 0x00007f23f23b74be in ?? () from /usr/lib/libQtGui.so.4
#24 0x00007f23f2e79532 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#25 0x00007f23f2e79904 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#26 0x00007f23f279d9de in QDialog::exec() () from /usr/lib/libQtGui.so.4
#27 0x00000000005438f8 in _start ()

Reported using DrKonqi