Application that crashed: k3b
Version of the application: 1.68.0
KDE Version: 4.3.5 (KDE 4.3.5)
Qt Version: 4.5.2
Operating System: Linux 2.6.31-17-generic x86_64
Distribution: Ubuntu 9.10

What I was doing when the application crashed:
I had just successfully copied a data CD and was attempting to copy a data DVD when K3b crashed. dmesg output:
[10649.938018] Intel AES-NI instructions are not detected.
[10649.995361] padlock: VIA PadLock not detected.
[17559.512623] sr 1:0:0:0: [sr0] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[17559.512634] sr 1:0:0:0: [sr0] Sense Key : Illegal Request [current]
[17559.512644] sr 1:0:0:0: [sr0] Add. Sense: Illegal mode for this track
[17559.512656] end_request: I/O error, dev sr0, sector 0
[17559.512664] __ratelimit: 12 callbacks suppressed
[17559.512670] Buffer I/O error on device sr0, logical block 0
[17559.514952] sr 1:0:0:0: [sr0] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[17559.514961] sr 1:0:0:0: [sr0] Sense Key : Illegal Request [current]
[17559.514969] sr 1:0:0:0: [sr0] Add. Sense: Illegal mode for this track
[17559.514979] end_request: I/O error, dev sr0, sector 0
[17559.514985] Buffer I/O error on device sr0, logical block 0
[17560.942032] cdrom: This disc doesn't have any tracks I recognize!

 -- Backtrace:
Application: K3b (k3b), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f5cdf20e750 (LWP 5929))]

Thread 2 (Thread 0x7f5cc573c910 (LWP 6743)):
[KCrash Handler]
#5  0x00007f5cdee0c3f1 in K3b::Device::Track::firstSector() const () from /usr/lib/libk3bdevice.so.6
#6  0x00007f5cdeac56dc in K3b::Medium::analyseContent() () from /usr/lib/libk3b.so.6
#7  0x00007f5cdeac6210 in K3b::Medium::update() () from /usr/lib/libk3b.so.6
#8  0x00007f5cdeac759c in K3b::MediaCache::PollThread::run() () from /usr/lib/libk3b.so.6
#9  0x00007f5cd9201445 in ?? () from /usr/lib/libQtCore.so.4
#10 0x00007f5cd61cca04 in start_thread () from /lib/libpthread.so.0
#11 0x00007f5cd7bb480d in clone () from /lib/libc.so.6
#12 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f5cdf20e750 (LWP 5929)):
#0  0x00007f5cd61d15a9 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#1  0x00007f5cd9200c93 in ?? () from /usr/lib/libQtCore.so.4
#2  0x00007f5cd91fc865 in QMutex::lock() () from /usr/lib/libQtCore.so.4
#3  0x00007f5cdeac77d1 in K3b::MediaCache::resetDevice(K3b::Device::Device*) () from /usr/lib/libk3b.so.6
#4  0x00007f5cdea8b11f in K3b::eject(K3b::Device::Device*) () from /usr/lib/libk3b.so.6
#5  0x00007f5cdeb09fd4 in K3b::DvdCopyJob::slotReaderFinished(bool) () from /usr/lib/libk3b.so.6
#6  0x00007f5cdeb0c048 in K3b::DvdCopyJob::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libk3b.so.6
#7  0x00007f5cd92fcddc in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQtCore.so.4
#8  0x00007f5cdea97fa2 in K3b::Job::finished(bool) () from /usr/lib/libk3b.so.6
#9  0x00007f5cdea98f74 in K3b::Job::jobFinished(bool) () from /usr/lib/libk3b.so.6
#10 0x00007f5cdea9a5ec in K3b::ThreadJob::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libk3b.so.6
#11 0x00007f5cd92f70f9 in QObject::event(QEvent*) () from /usr/lib/libQtCore.so.4
#12 0x00007f5cd878fefc in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#13 0x00007f5cd87971ce in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#14 0x00007f5cda157f46 in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#15 0x00007f5cd92e7c2c in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#16 0x00007f5cd92e880a in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () from /usr/lib/libQtCore.so.4
#17 0x00007f5cd9310533 in ?? () from /usr/lib/libQtCore.so.4
#18 0x00007f5cd43a5bce in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#19 0x00007f5cd43a9598 in ?? () from /lib/libglib-2.0.so.0
#20 0x00007f5cd43a96c0 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#21 0x00007f5cd93101a6 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#22 0x00007f5cd88244be in ?? () from /usr/lib/libQtGui.so.4
#23 0x00007f5cd92e6532 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#24 0x00007f5cd92e6904 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#25 0x00007f5cd8c0a9de in QDialog::exec() () from /usr/lib/libQtGui.so.4
#26 0x00000000005438f8 in _start ()

Reported using DrKonqi