Version:            (using KDE 4.1.0)
OS:                FreeBSD
Installed from:    FreeBSD Ports

Dolphin crashes on start-up, with a Places panel and a single view, in Icon mode, with the Preview button on, and the following possibly relevant settings:

STARTUP
Split view mode OFF
Editable location bar ON
Show filter bar OFF

VIEW MODES - GENERAL
Use common view properties for all folders ON
Previews maximum file size: 5MB
Use thumbnails embedded in files OFF
Show selection toggle ON
Show tooltips OFF

VIEW MODES - ICONS
Font: System font
Number of lines: 2
Text width: Small
Grid arrangement: Top to Bottom
Grid spacing: Small


BACKTRACE

Application: Dolphin (dolphin), signal SIGABRT
[New Thread 0x8101100 (LWP 100198)]
[Switching to Thread 0x8101100 (LWP 100198)]
[KCrash handler]
#6  0x29d780b7 in kill () from /lib/libc.so.7
#7  0x28e12147 in raise () from /lib/libthr.so.3
#8  0x29d76c2a in abort () from /lib/libc.so.7
#9  0x28c8cb95 in qt_message_output () from /usr/local/lib/qt4/libQtCore.so.4
#10 0x28c8cc49 in qFatal () from /usr/local/lib/qt4/libQtCore.so.4
#11 0x28c8cce5 in qt_assert () from /usr/local/lib/qt4/libQtCore.so.4
#12 0x28288b6e in KDirModel::setData (this=0x82ff3d0, index=@0x6, 
    value=@0xbfbfe0e4, role=1)
    at /usr/ports/x11/kdelibs4/work/kdelibs-4.1.0/kio/kio/kdirmodel.cpp:558
#13 0x28120b1f in IconManager::dispatchPreviewQueue (this=0x82febc0)
    at /usr/ports/x11/kdebase4/work/kdebase-4.1.0/apps/dolphin/src/iconmanager.cpp:317
#14 0x28121797 in IconManager::qt_metacall (this=0x82febc0, 
    _c=QMetaObject::InvokeMetaMethod, _id=4, _a=0xbfbfe1a8)
    at iconmanager.moc:79
#15 0x28d779ec in QMetaObject::activate ()
   from /usr/local/lib/qt4/libQtCore.so.4
#16 0x28d77e22 in QMetaObject::activate ()
   from /usr/local/lib/qt4/libQtCore.so.4
#17 0x28db0df7 in QTimer::timeout () from /usr/local/lib/qt4/libQtCore.so.4
#18 0x28d804ee in QTimer::timerEvent () from /usr/local/lib/qt4/libQtCore.so.4
#19 0x28d76894 in QObject::event () from /usr/local/lib/qt4/libQtCore.so.4
#20 0x2945d6fc in QApplicationPrivate::notify_helper ()
   from /usr/local/lib/qt4/libQtGui.so.4
#21 0x294640be in QApplication::notify ()
   from /usr/local/lib/qt4/libQtGui.so.4
#22 0x28619ab3 in KApplication::notify (this=0xbfbfe7fc, receiver=0x82d61a0, 
    event=0xbfbfe59c)
    at /usr/ports/x11/kdelibs4/work/kdelibs-4.1.0/kdeui/kernel/kapplication.cpp:311
#23 0x28d67459 in QCoreApplication::notifyInternal ()
   from /usr/local/lib/qt4/libQtCore.so.4
#24 0x28d90188 in QTimerInfoList::activateTimers ()
   from /usr/local/lib/qt4/libQtCore.so.4
#25 0x28d8de30 in timerSourceDispatch ()
   from /usr/local/lib/qt4/libQtCore.so.4
#26 0x29eaa096 in g_main_context_dispatch ()
   from /usr/local/lib/libglib-2.0.so.0
#27 0x29ead432 in g_main_context_check () from /usr/local/lib/libglib-2.0.so.0
#28 0x29ead9b5 in g_main_context_iteration ()
   from /usr/local/lib/libglib-2.0.so.0
#29 0x28d8e4be in QEventDispatcherGlib::processEvents ()
   from /usr/local/lib/qt4/libQtCore.so.4
#30 0x294e2075 in QGuiEventDispatcherGlib::processEvents ()
   from /usr/local/lib/qt4/libQtGui.so.4
#31 0x28d665d3 in QEventLoop::processEvents ()
   from /usr/local/lib/qt4/libQtCore.so.4
#32 0x28d66761 in QEventLoop::exec () from /usr/local/lib/qt4/libQtCore.so.4
#33 0x28d6894a in QCoreApplication::exec ()
   from /usr/local/lib/qt4/libQtCore.so.4
#34 0x2945cc97 in QApplication::exec () from /usr/local/lib/qt4/libQtGui.so.4
#35 0x0808550b in main (argc=6, argv=0xbfbfe958)
    at /usr/ports/x11/kdebase4/work/kdebase-4.1.0/apps/dolphin/src/main.cpp:94