Version:            (using KDE 4.1.2)
OS:                Linux
Installed from:    Ubuntu Packages

I opened Konqueror, clicked Applications, then Graphics.  I am able to recreate this bug.  The dump is shown below:
Application: Konqueror (konqueror), signal SIGABRT
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[Thread debugging using libthread_db enabled]
[New Thread 0x7f45260ae6f0 (LWP 20616)]
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[KCrash handler]
#5  0x00007f452588cfd5 in raise () from /lib/libc.so.6
#6  0x00007f452588eb43 in abort () from /lib/libc.so.6
#7  0x00007f4523ed56b5 in qt_message_output () from /usr/lib/libQtCore.so.4
#8  0x00007f4523ed57fd in qFatal () from /usr/lib/libQtCore.so.4
#9  0x00007f4524e1f160 in ?? () from /usr/lib/libkio.so.5
#10 0x00007f4524e22cca in KDirModel::indexForUrl () from /usr/lib/libkio.so.5
#11 0x00007f45143e44e0 in ?? () from /usr/lib/libdolphinprivate.so.4
#12 0x00007f45143e45f5 in ?? () from /usr/lib/libdolphinprivate.so.4
#13 0x00007f45143e49d8 in ?? () from /usr/lib/libdolphinprivate.so.4
#14 0x00007f4523fda134 in QMetaObject::activate ()
   from /usr/lib/libQtCore.so.4
#15 0x00007f4522f8d237 in QItemSelectionModel::selectionChanged ()
   from /usr/lib/libQtGui.so.4
#16 0x00007f4522f94c7e in QItemSelectionModel::emitSelectionChanged ()
   from /usr/lib/libQtGui.so.4
#17 0x00007f4522f95491 in QItemSelectionModel::select ()
   from /usr/lib/libQtGui.so.4
#18 0x00007f4522f6636e in QListView::setSelection ()
   from /usr/lib/libQtGui.so.4
#19 0x00007f452490acb7 in KCategorizedView::setSelection ()
   from /usr/lib/libkdeui.so.5
#20 0x00007f4522f42acf in QAbstractItemView::mousePressEvent ()
   from /usr/lib/libQtGui.so.4
#21 0x00007f45249088a8 in KCategorizedView::mousePressEvent ()
   from /usr/lib/libkdeui.so.5
#22 0x00007f4522b2433f in QWidget::event () from /usr/lib/libQtGui.so.4
#23 0x00007f4522f498ad in QAbstractItemView::viewportEvent ()
   from /usr/lib/libQtGui.so.4
#24 0x00007f4523fc5038 in QCoreApplicationPrivate::sendThroughObjectEventFilters () from /usr/lib/libQtCore.so.4
#25 0x00007f4522ad1c0c in QApplicationPrivate::notify_helper ()
   from /usr/lib/libQtGui.so.4
#26 0x00007f4522ada25a in QApplication::notify () from /usr/lib/libQtGui.so.4
#27 0x00007f4524921b8b in KApplication::notify () from /usr/lib/libkdeui.so.5
#28 0x00007f4523fc5d61 in QCoreApplication::notifyInternal ()
   from /usr/lib/libQtCore.so.4
#29 0x00007f4522ad95f8 in QApplicationPrivate::sendMouseEvent ()
   from /usr/lib/libQtGui.so.4
#30 0x00007f4522b3dc19 in ?? () from /usr/lib/libQtGui.so.4
#31 0x00007f4522b3c637 in QApplication::x11ProcessEvent ()
   from /usr/lib/libQtGui.so.4
#32 0x00007f4522b642f4 in ?? () from /usr/lib/libQtGui.so.4
#33 0x00007f451fe0bd3b in g_main_context_dispatch ()
   from /usr/lib/libglib-2.0.so.0
#34 0x00007f451fe0f50d in ?? () from /usr/lib/libglib-2.0.so.0
#35 0x00007f451fe0f6cb in g_main_context_iteration ()
   from /usr/lib/libglib-2.0.so.0
#36 0x00007f4523fee15f in QEventDispatcherGlib::processEvents ()
   from /usr/lib/libQtCore.so.4
#37 0x00007f4522b63a9f in ?? () from /usr/lib/libQtGui.so.4
#38 0x00007f4523fc4682 in QEventLoop::processEvents ()
   from /usr/lib/libQtCore.so.4
#39 0x00007f4523fc480d in QEventLoop::exec () from /usr/lib/libQtCore.so.4
#40 0x00007f4523fc6cbd in QCoreApplication::exec ()
   from /usr/lib/libQtCore.so.4
#41 0x00007f4525c96051 in kdemain () from /usr/lib/libkdeinit4_konqueror.so
#42 0x00007f4525878466 in __libc_start_main () from /lib/libc.so.6
#43 0x0000000000400669 in _start ()
#0  0x00007f45259025f0 in nanosleep () from /lib/libc.so.6