Application that crashed: k3b
Version of the application: 1.90.0
KDE Version: 4.3.4 (KDE 4.3.4)
Qt Version: 4.6.2
Operating System: Linux 2.6.32-3-686 i686
Distribution: Debian GNU/Linux testing (squeeze)

What I was doing when the application crashed:
I had 2 windows open - main and the medium copy window. I have switched off the drive with the said medium and closed the medium copy window. K3B crashed. 

 -- Backtrace:
Application: K3b (k3b), signal: Segmentation fault
[Current thread is 1 (Thread 0xb3490700 (LWP 22720))]

Thread 4 (Thread 0xb04e9b70 (LWP 28802)):
#0  0xb77da424 in __kernel_vsyscall ()
#1  0xb3d003d2 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib/i686/cmov/libpthread.so.0
#2  0xb4640864 in pthread_cond_timedwait () from /lib/i686/cmov/libc.so.6
#3  0xb52ed241 in ?? () from /usr/lib/libQtCore.so.4
#4  0xb52ed3d0 in QThread::sleep(unsigned long) () from /usr/lib/libQtCore.so.4
#5  0xb763f8b9 in K3b::MediaCache::PollThread::run (this=0x8cbd210) at /build/buildd-k3b_1.90.0~rc1-1-i386-F9lsHx/k3b-1.90.0~rc1/libk3b/tools/k3bmediacache.cpp:106
#6  0xb52ed93e in ?? () from /usr/lib/libQtCore.so.4
#7  0xb3cfc585 in start_thread () from /lib/i686/cmov/libpthread.so.0
#8  0xb463329e in clone () from /lib/i686/cmov/libc.so.6

Thread 3 (Thread 0xafce8b70 (LWP 28803)):
#0  0xb77da424 in __kernel_vsyscall ()
#1  0xb3d003d2 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib/i686/cmov/libpthread.so.0
#2  0xb4640864 in pthread_cond_timedwait () from /lib/i686/cmov/libc.so.6
#3  0xb52ed241 in ?? () from /usr/lib/libQtCore.so.4
#4  0xb52ed3d0 in QThread::sleep(unsigned long) () from /usr/lib/libQtCore.so.4
#5  0xb763f8b9 in K3b::MediaCache::PollThread::run (this=0x8cb67d0) at /build/buildd-k3b_1.90.0~rc1-1-i386-F9lsHx/k3b-1.90.0~rc1/libk3b/tools/k3bmediacache.cpp:106
#6  0xb52ed93e in ?? () from /usr/lib/libQtCore.so.4
#7  0xb3cfc585 in start_thread () from /lib/i686/cmov/libpthread.so.0
#8  0xb463329e in clone () from /lib/i686/cmov/libc.so.6

Thread 2 (Thread 0xaf27fb70 (LWP 28804)):
#0  0xb77da424 in __kernel_vsyscall ()
#1  0xb3d003d2 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib/i686/cmov/libpthread.so.0
#2  0xb4640864 in pthread_cond_timedwait () from /lib/i686/cmov/libc.so.6
#3  0xb52ed241 in ?? () from /usr/lib/libQtCore.so.4
#4  0xb52ed3d0 in QThread::sleep(unsigned long) () from /usr/lib/libQtCore.so.4
#5  0xb763f8b9 in K3b::MediaCache::PollThread::run (this=0x90d2578) at /build/buildd-k3b_1.90.0~rc1-1-i386-F9lsHx/k3b-1.90.0~rc1/libk3b/tools/k3bmediacache.cpp:106
#6  0xb52ed93e in ?? () from /usr/lib/libQtCore.so.4
#7  0xb3cfc585 in start_thread () from /lib/i686/cmov/libpthread.so.0
#8  0xb463329e in clone () from /lib/i686/cmov/libc.so.6

Thread 1 (Thread 0xb3490700 (LWP 22720)):
[KCrash Handler]
#6  0x08164295 in K3b::MetaItemModel::subModelForIndex (this=0x8f1fdb0, index=...) at /build/buildd-k3b_1.90.0~rc1-1-i386-F9lsHx/k3b-1.90.0~rc1/src/k3bmetaitemmodel.cpp:356
#7  0x0816a714 in K3b::PlacesModel::itemForIndex (this=0x8ce74d8, index=...) at /build/buildd-k3b_1.90.0~rc1-1-i386-F9lsHx/k3b-1.90.0~rc1/src/k3bplacesmodel.cpp:88
#8  0x0816e2ae in K3b::FileTreeView::slotContextMenu (this=0x8c5b028, pos=...) at /build/buildd-k3b_1.90.0~rc1-1-i386-F9lsHx/k3b-1.90.0~rc1/src/k3bfiletreeview.cpp:186
#9  0x0816f17a in K3b::FileTreeView::qt_metacall (this=0x8c5b028, _c=QMetaObject::InvokeMetaMethod, _id=94, _a=0xbfbb7fe8)
    at /build/buildd-k3b_1.90.0~rc1-1-i386-F9lsHx/k3b-1.90.0~rc1/obj-i486-linux-gnu/src/k3bfiletreeview.moc:87
#10 0xb53f4aea in QMetaObject::metacall(QObject*, QMetaObject::Call, int, void**) () from /usr/lib/libQtCore.so.4
#11 0xb54030b5 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib/libQtCore.so.4
#12 0xb49879e3 in QWidget::customContextMenuRequested(QPoint const&) () from /usr/lib/libQtGui.so.4
#13 0xb4995844 in QWidget::event(QEvent*) () from /usr/lib/libQtGui.so.4
#14 0xb4d8d4a3 in QFrame::event(QEvent*) () from /usr/lib/libQtGui.so.4
#15 0xb4e27a32 in QAbstractScrollArea::viewportEvent(QEvent*) () from /usr/lib/libQtGui.so.4
#16 0xb4edc5c7 in QAbstractItemView::viewportEvent(QEvent*) () from /usr/lib/libQtGui.so.4
#17 0xb4f1d95c in QTreeView::viewportEvent(QEvent*) () from /usr/lib/libQtGui.so.4
#18 0xb4e2a415 in ?? () from /usr/lib/libQtGui.so.4
#19 0xb53eeb8a in QCoreApplicationPrivate::sendThroughObjectEventFilters(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#20 0xb4936bc9 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#21 0xb493db70 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#22 0xb59f3e2a in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#23 0xb53ef8eb in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#24 0xb49cdbbe in QCoreApplication::sendSpontaneousEvent(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#25 0xb49c8102 in ?? () from /usr/lib/libQtGui.so.4
#26 0xb49c75ab in QApplication::x11ProcessEvent(_XEvent*) () from /usr/lib/libQtGui.so.4
#27 0xb49f56f2 in ?? () from /usr/lib/libQtGui.so.4
#28 0xb3b8c2e5 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#29 0xb3b90000 in ?? () from /lib/libglib-2.0.so.0
#30 0xb3b90198 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#31 0xb541b2f5 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#32 0xb49f5255 in ?? () from /usr/lib/libQtGui.so.4
#33 0xb53edf09 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#34 0xb53ee35a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#35 0xb53f24ef in QCoreApplication::exec() () from /usr/lib/libQtCore.so.4
#36 0xb4936c87 in QApplication::exec() () from /usr/lib/libQtGui.so.4
#37 0x08181538 in main (argc=1, argv=0xbfbb94d4) at /build/buildd-k3b_1.90.0~rc1-1-i386-F9lsHx/k3b-1.90.0~rc1/src/main.cpp:151

Reported using DrKonqi