Application that crashed: software-properties-kde
Version of the application: 0.64
KDE Version: 4.3.2 (KDE 4.3.2)
Qt Version: 4.5.2
Operating System: Linux 2.6.28-14-generic i686
Distribution: Ubuntu 9.04

What I was doing when the application crashed:
I just marked an unmarked source, and it crashed.

Running Ubuntu 9.4 32bit
kde 3.1

 -- Backtrace:
Application: Software Sources (software-properties-kde), signal: Segmentation fault
[KCrash Handler]
#5  0xb69d0020 in QTreeWidgetItem::setData (this=0xa084ad8, column=0, role=10, value=@0xbf9d31e0) at itemviews/qtreewidget.cpp:1750
#6  0xb6dfb205 in ?? () from /usr/lib/python2.6/dist-packages/PyQt4/QtGui.so
#7  0xb69c9a6f in QTreeModel::setData (this=0x9f0c7e0, index=@0xbf9d32ec, value=@0xbf9d31e0, role=10) at itemviews/qtreewidget.cpp:388
#8  0xb6a03cfd in QStyledItemDelegate::editorEvent (this=0x9f0d188, event=0xbf9d3d98, model=0x9f0c7e0, option=@0xbf9d325c, index=@0xbf9d32ec) at itemviews/qstyleditemdelegate.cpp:757
#9  0xb69591d6 in QAbstractItemViewPrivate::sendDelegateEvent (this=0x9f52dd8, index=@0x9e42448, event=0xbf9d3d98) at itemviews/qabstractitemview.cpp:3845
#10 0xb695948b in QAbstractItemView::edit (this=0x9f527f8, index=@0x9e42448, trigger=QAbstractItemView::NoEditTriggers, event=0xbf9d3d98) at itemviews/qabstractitemview.cpp:2327
#11 0xb6df0be4 in ?? () from /usr/lib/python2.6/dist-packages/PyQt4/QtGui.so
#12 0xb6959774 in QAbstractItemView::mouseReleaseEvent (this=0x9f527f8, event=0xbf9d3d98) at itemviews/qabstractitemview.cpp:1652
#13 0xb699c82c in QTreeView::mouseReleaseEvent (this=0x9f527f8, event=0xbf9d3d98) at itemviews/qtreeview.cpp:1796
#14 0xb6dfd768 in ?? () from /usr/lib/python2.6/dist-packages/PyQt4/QtGui.so
#15 0xb6458973 in QWidget::event (this=0x9f527f8, event=0xbf9d3d98) at kernel/qwidget.cpp:7549
#16 0xb6809a53 in QFrame::event (this=0x9f527f8, e=0xbf9d3d98) at widgets/qframe.cpp:559
#17 0xb68a9c2f in QAbstractScrollArea::viewportEvent (this=0x9f527f8, e=0x1) at widgets/qabstractscrollarea.cpp:962
#18 0xb695c4a7 in QAbstractItemView::viewportEvent (this=0x9f527f8, event=0xbf9d3d98) at itemviews/qabstractitemview.cpp:1476
#19 0xb6996ff6 in QTreeView::viewportEvent (this=0x9f527f8, event=0xbf9d3d98) at itemviews/qtreeview.cpp:1266
#20 0xb6dd7c6a in ?? () from /usr/lib/python2.6/dist-packages/PyQt4/QtGui.so
#21 0xb68ac235 in QAbstractScrollAreaFilter::eventFilter (this=0x9f0d088, o=0x9f07ed0, e=0xbf9d3d98) at widgets/qabstractscrollarea_p.h:100
#22 0xb751cdea in QCoreApplicationPrivate::sendThroughObjectEventFilters (this=0x9dca910, receiver=0x9f07ed0, event=0xbf9d3d98) at kernel/qcoreapplication.cpp:726
#23 0xb6401d1a in QApplicationPrivate::notify_helper (this=0x9dca910, receiver=0x9f07ed0, e=0xbf9d3d98) at kernel/qapplication.cpp:4052
#24 0xb640a9b1 in QApplication::notify (this=0x9dba0e8, receiver=0x9f07ed0, e=0xbf9d3d98) at kernel/qapplication.cpp:3758
#25 0xb4e7249d in KApplication::notify (this=0x9dba0e8, receiver=0x9f07ed0, event=0xbf9d3d98) at /build/buildd/kde4libs-4.3.2/kdeui/kernel/kapplication.cpp:302
#26 0xb5443076 in sipKApplication::notify () from /usr/lib/python2.6/dist-packages/PyKDE4/kdeui.so
#27 0xb751dbcb in QCoreApplication::notifyInternal (this=0x9dba0e8, receiver=0x9f07ed0, event=0xbf9d3d98) at kernel/qcoreapplication.cpp:610
#28 0xb6409a1e in QApplicationPrivate::sendMouseEvent (receiver=0x9f07ed0, event=0xbf9d3d98, alienWidget=0x9f07ed0, nativeWidget=0x9e4b740, buttonDown=0xb6c83aa0, lastMouseReceiver=@0xb6c83aa4)
    at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:216
#29 0xb6479cce in QETWidget::translateMouseEvent (this=0x9e4b740, event=0xbf9d542c) at kernel/qapplication_x11.cpp:4409
#30 0xb6479085 in QApplication::x11ProcessEvent (this=0x9dba0e8, event=0xbf9d542c) at kernel/qapplication_x11.cpp:3428
#31 0xb64a437a in x11EventSourceDispatch (s=0x9db7890, callback=0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#32 0xb735bb88 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#33 0xb735f0eb in ?? () from /usr/lib/libglib-2.0.so.0
#34 0xb735f268 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#35 0xb75492f8 in QEventDispatcherGlib::processEvents (this=0x9b21c30, flags={i = -1080207896}) at kernel/qeventdispatcher_glib.cpp:327
#36 0xb64a3a75 in QGuiEventDispatcherGlib::processEvents (this=0x9b21c30, flags={i = -1080207848}) at kernel/qguieventdispatcher_glib.cpp:202
#37 0xb751c1fa in QEventLoop::processEvents (this=0xbf9d5690, flags={i = -1080207784}) at kernel/qeventloop.cpp:149
#38 0xb751c642 in QEventLoop::exec (this=0xbf9d5690, flags={i = -1080207720}) at kernel/qeventloop.cpp:201
#39 0xb751eae9 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#40 0xb6401bb7 in QApplication::exec () at kernel/qapplication.cpp:3525
#41 0xb70ceef6 in ?? () from /usr/lib/python2.6/dist-packages/PyQt4/QtGui.so
#42 0x080de562 in PyEval_EvalFrameEx ()
#43 0x080df587 in PyEval_EvalFrameEx ()
#44 0x080e00b8 in PyEval_EvalCodeEx ()
#45 0x080e0217 in PyEval_EvalCode ()
#46 0x080fe0e1 in PyRun_FileExFlags ()
#47 0x080fe43a in PyRun_SimpleFileExFlags ()
#48 0x0805c882 in Py_Main ()
#49 0x0805b972 in main ()

Reported using DrKonqi