Application that crashed: kompare
Version of the application: 4.0.0
KDE Version: 4.3.2 (KDE 4.3.2)
Qt Version: 4.5.2
Operating System: Linux 2.6.31-20-generic x86_64
Distribution: Ubuntu 9.10

What I was doing when the application crashed:
After compare, when trying to change folder and then hit "next file" option, cause it to fail.

 -- Backtrace:
Application: Kompare (kompare), signal: Segmentation fault
[KCrash Handler]
#5  0x00007f359548c5f9 in ?? () from /usr/lib/kde4/libkomparenavtreepart.so
#6  0x00007f359548e6b7 in ?? () from /usr/lib/kde4/libkomparenavtreepart.so
#7  0x00007f359548e9f2 in ?? () from /usr/lib/kde4/libkomparenavtreepart.so
#8  0x00007f359548ec6a in ?? () from /usr/lib/kde4/libkomparenavtreepart.so
#9  0x00007f35a8f0dddc in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQtCore.so.4
#10 0x00007f359620167b in ?? () from /usr/lib/kde4/libkomparepart.so
#11 0x00007f3596207fa0 in ?? () from /usr/lib/kde4/libkomparepart.so
#12 0x00007f35a8f0dddc in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQtCore.so.4
#13 0x00007f3595fc237b in Diff2::KompareModelList::setSelection(Diff2::DiffModel const*, Diff2::Difference const*) () from /usr/lib/libkomparediff2.so.4
#14 0x00007f3595fc9104 in Diff2::KompareModelList::slotNextModel() () from /usr/lib/libkomparediff2.so.4
#15 0x00007f3595fcade1 in Diff2::KompareModelList::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libkomparediff2.so.4
#16 0x00007f35a8f0dddc in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQtCore.so.4
#17 0x00007f35a98130a7 in QAction::triggered(bool) () from /usr/lib/libQtGui.so.4
#18 0x00007f35a98144ef in QAction::activate(QAction::ActionEvent) () from /usr/lib/libQtGui.so.4
#19 0x00007f35a9b7dfea in ?? () from /usr/lib/libQtGui.so.4
#20 0x00007f35a9b7e275 in QAbstractButton::mouseReleaseEvent(QMouseEvent*) () from /usr/lib/libQtGui.so.4
#21 0x00007f35a9c4ccba in QToolButton::mouseReleaseEvent(QMouseEvent*) () from /usr/lib/libQtGui.so.4
#22 0x00007f35a98679c0 in QWidget::event(QEvent*) () from /usr/lib/libQtGui.so.4
#23 0x00007f35a9818efc in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#24 0x00007f35a9820011 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#25 0x00007f35aa44fab6 in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#26 0x00007f35a8ef8c2c in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#27 0x00007f35a981f8e0 in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&) () from /usr/lib/libQtGui.so.4
#28 0x00007f35a9885a0e in ?? () from /usr/lib/libQtGui.so.4
#29 0x00007f35a9884aa9 in QApplication::x11ProcessEvent(_XEvent*) () from /usr/lib/libQtGui.so.4
#30 0x00007f35a98add0c in ?? () from /usr/lib/libQtGui.so.4
#31 0x00007f35a4ddebce in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#32 0x00007f35a4de2598 in ?? () from /lib/libglib-2.0.so.0
#33 0x00007f35a4de26c0 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#34 0x00007f35a8f211a6 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#35 0x00007f35a98ad4be in ?? () from /usr/lib/libQtGui.so.4
#36 0x00007f35a8ef7532 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#37 0x00007f35a8ef7904 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#38 0x00007f35a8ef9ab9 in QCoreApplication::exec() () from /usr/lib/libQtCore.so.4
#39 0x000000000040a6e2 in _start ()

Reported using DrKonqi