Application: dolphin (1.4)
KDE Platform Version: 4.4.2 (KDE 4.4.2)
Qt Version: 4.6.2
Operating System: Linux 2.6.32-21-generic x86_64
Distribution: Ubuntu lucid (development branch)

-- Information about the crash:
Hello,

1. I opened 2 folders in split view (was migrating files from an older home directory).
    Thumbnails were off, this happened both in list and icon view.
2. Selected all (Ctrl+a) files/folders in the left pane.
3. Just mousing over the now selected folders/files quickly results in a segfault.
4. This happens every single time.

A few other notes: at first the crash handler wouldn't start automatically - the first few times the window just vanished. Running dolphin --nofork by hand did get it to run the handler though. A relog fixed that though.
Also the crash handler couldn't find the soprano debug package (libsoprano-dbg), had to install it by hand.

Please let me know if there's anything else I can assist with.

Thanks for your work!

The crash can be reproduced every time.

 -- Backtrace:
Application: Dolphin (dolphin), signal: Segmentation fault
[Current thread is 1 (Thread 0x7fd4a8043760 (LWP 1851))]

Thread 3 (Thread 0x7fd49749d710 (LWP 1857)):
#0  0x00007fd4a3cc4f53 in *__GI___poll (fds=<value optimized out>, nfds=<value optimized out>, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007fd4a00eb4a9 in g_main_context_poll (context=0x1655f40, block=<value optimized out>, dispatch=<value optimized out>, self=<value optimized out>)
    at /build/buildd/glib2.0-2.24.0/glib/gmain.c:2904
#2  g_main_context_iterate (context=0x1655f40, block=<value optimized out>, dispatch=<value optimized out>, self=<value optimized out>) at /build/buildd/glib2.0-2.24.0/glib/gmain.c:2586
#3  0x00007fd4a00eb8fc in IA__g_main_context_iteration (context=0x1655f40, may_block=1) at /build/buildd/glib2.0-2.24.0/glib/gmain.c:2654
#4  0x00007fd4a4418566 in QEventDispatcherGlib::processEvents (this=0x15b8f60, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:414
#5  0x00007fd4a43ed992 in QEventLoop::processEvents (this=<value optimized out>, flags=) at kernel/qeventloop.cpp:149
#6  0x00007fd4a43edd6c in QEventLoop::exec (this=0x7fd49749cdb0, flags=) at kernel/qeventloop.cpp:201
#7  0x00007fd4a42f7d59 in QThread::exec (this=<value optimized out>) at thread/qthread.cpp:487
#8  0x00007fd4a43ce178 in QInotifyFileSystemWatcherEngine::run (this=0x16536a0) at io/qfilesystemwatcher_inotify.cpp:248
#9  0x00007fd4a42fa775 in QThreadPrivate::start (arg=0x16536a0) at thread/qthread_unix.cpp:248
#10 0x00007fd4a12309ca in start_thread (arg=<value optimized out>) at pthread_create.c:300
#11 0x00007fd4a3cd169d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#12 0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7fd49483b710 (LWP 1894)):
[KCrash Handler]
#5  memcpy () at ../sysdeps/x86_64/memcpy.S:267
#6  0x00007fd4a206ecb4 in QList<int>::node_copy (this=0x7fd490009948) at /usr/include/bits/string3.h:52
#7  QList<int>::detach_helper (this=0x7fd490009948) at /usr/include/qt4/QtCore/qlist.h:606
#8  0x00007fd4a206ece3 in QList<int>::detach (this=0x7fd490009948, t=@0x7fd49483a0cc) at /usr/include/qt4/QtCore/qlist.h:122
#9  QList<int>::append (this=0x7fd490009948, t=@0x7fd49483a0cc) at /usr/include/qt4/QtCore/qlist.h:468
#10 0x00007fd4a206ea1d in Soprano::Client::ClientModel::executeQuery (this=0x7fd490009910, query=<value optimized out>, language=<value optimized out>, userQueryLanguage=<value optimized out>)
    at ../../client/clientmodel.cpp:104
#11 0x00007fd4a6d80b9d in Nepomuk::MainModel::executeQuery (this=0x15747b0, query=..., language=Soprano::Query::QueryLanguageSparql, userQueryLanguage=...)
    at ../../../nepomuk/core/nepomukmainmodel.cpp:213
#12 0x00007fd4a6ab277c in Soprano::FilterModel::executeQuery (this=0x1572210, query=<value optimized out>, language=Soprano::Query::QueryLanguageUser, userQueryLanguage=...)
    at ../../soprano/filtermodel.cpp:164
#13 0x00007fd4a6d75635 in Nepomuk::ResourceData::determineUri (this=0x7fd490086610) at ../../../nepomuk/core/resourcedata.cpp:671
#14 0x00007fd4a6d76802 in Nepomuk::ResourceData::load (this=0x7fd490086610) at ../../../nepomuk/core/resourcedata.cpp:414
#15 0x00007fd4a6d771b8 in Nepomuk::ResourceData::property (this=0x7fd490086610, uri=...) at ../../../nepomuk/core/resourcedata.cpp:271
#16 0x00007fd4a6d91ee2 in Nepomuk::Resource::property (this=<value optimized out>, uri=...) at ../../../nepomuk/core/resource.cpp:280
#17 0x00007fd4a6d949d0 in Nepomuk::Resource::rating (this=0x7fd49483ac80) at ../../../nepomuk/core/resource.cpp:800
#18 0x0000000000465c1d in KLoadMetaDataThread::run (this=0x19352f0) at ../../../../apps/dolphin/src/panels/information/kloadmetadatathread.cpp:92
#19 0x00007fd4a42fa775 in QThreadPrivate::start (arg=0x19352f0) at thread/qthread_unix.cpp:248
#20 0x00007fd4a12309ca in start_thread (arg=<value optimized out>) at pthread_create.c:300
#21 0x00007fd4a3cd169d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#22 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7fd4a8043760 (LWP 1851)):
#0  0x00007fd4a3cc4f53 in *__GI___poll (fds=<value optimized out>, nfds=<value optimized out>, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007fd49eb4e29a in ?? () from /usr/lib/libxcb.so.1
#2  0x00007fd49eb4fc2c in xcb_wait_for_reply () from /usr/lib/libxcb.so.1
#3  0x00007fd4a2bfa8d3 in _XReply () from /usr/lib/libX11.so.6
#4  0x00007fd4a2bd6a45 in XGetImage () from /usr/lib/libX11.so.6
#5  0x00007fd4a50d6a43 in QX11PixmapData::toImage (this=0x164c7f0) at image/qpixmap_x11.cpp:1492
#6  0x00007fd4a50beb60 in QPixmap::toImage (this=0x7fff1ef522e0) at image/qpixmap.cpp:486
#7  0x00007fd4a5ca6d6d in KIconEffect::apply (this=0x7fff1ef52360, pixmap=<value optimized out>, effect=1, value=<value optimized out>, col=..., col2=<value optimized out>, trans=false)
    at ../../kdeui/icons/kiconeffect.cpp:287
#8  0x00007fd4a5ca6f51 in KIconEffect::apply (this=<value optimized out>, pixmap=..., effect=1, value=<value optimized out>, col=<value optimized out>, trans=false)
    at ../../kdeui/icons/kiconeffect.cpp:266
#9  0x00007fd4a6d8f4a0 in KRatingPainter::paint (this=<value optimized out>, painter=0x7fff1ef523d0, rect=..., rating=0, hoverRating=<value optimized out>)
    at ../../../nepomuk/core/ui/kratingpainter.cpp:201
#10 0x00007fd4a6d8499c in KRatingWidget::paintEvent (this=0x1577f20, e=<value optimized out>) at ../../../nepomuk/core/ui/kratingwidget.cpp:233
#11 0x00007fd4a5032162 in QWidget::event (this=0x1577f20, event=0x7fff1ef52c10) at kernel/qwidget.cpp:8144
#12 0x00007fd4a53d94e6 in QFrame::event (this=0x1577f20, e=0x7fff1ef52c10) at widgets/qframe.cpp:557
#13 0x00007fd4a4fdc22c in QApplicationPrivate::notify_helper (this=0x1101020, receiver=0x1577f20, e=0x7fff1ef52c10) at kernel/qapplication.cpp:4300
#14 0x00007fd4a4fe26fb in QApplication::notify (this=0x7fff1ef569e0, receiver=0x1577f20, e=0x7fff1ef52c10) at kernel/qapplication.cpp:4183
#15 0x00007fd4a5ce7526 in KApplication::notify (this=0x7fff1ef569e0, receiver=0x1577f20, event=0x7fff1ef52c10) at ../../kdeui/kernel/kapplication.cpp:302
#16 0x00007fd4a43ef06c in QCoreApplication::notifyInternal (this=0x7fff1ef569e0, receiver=0x1577f20, event=0x7fff1ef52c10) at kernel/qcoreapplication.cpp:704
#17 0x00007fd4a503a7dd in QCoreApplication::sendSpontaneousEvent (this=0x1577f60, pdev=<value optimized out>, rgn=..., offset=<value optimized out>, flags=<value optimized out>, sharedPainter=0x0, 
    backingStore=0x142e5f0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:218
#18 QWidgetPrivate::drawWidget (this=0x1577f60, pdev=<value optimized out>, rgn=..., offset=<value optimized out>, flags=<value optimized out>, sharedPainter=0x0, backingStore=0x142e5f0)
    at kernel/qwidget.cpp:5339
#19 0x00007fd4a503b478 in QWidgetPrivate::paintSiblingsRecursive (this=<value optimized out>, pdev=<value optimized out>, siblings=..., index=7, rgn=<value optimized out>, 
    offset=<value optimized out>, flags=4, sharedPainter=0x0, backingStore=0x142e5f0) at kernel/qwidget.cpp:5452
#20 0x00007fd4a503b2a9 in QWidgetPrivate::paintSiblingsRecursive (this=<value optimized out>, pdev=<value optimized out>, siblings=..., index=8, rgn=<value optimized out>, 
    offset=<value optimized out>, flags=4, sharedPainter=0x0, backingStore=0x142e5f0) at kernel/qwidget.cpp:5439
#21 0x00007fd4a503b2a9 in QWidgetPrivate::paintSiblingsRecursive (this=<value optimized out>, pdev=<value optimized out>, siblings=..., index=9, rgn=<value optimized out>, 
    offset=<value optimized out>, flags=4, sharedPainter=0x0, backingStore=0x142e5f0) at kernel/qwidget.cpp:5439
#22 0x00007fd4a503b2a9 in QWidgetPrivate::paintSiblingsRecursive (this=<value optimized out>, pdev=<value optimized out>, siblings=..., index=10, rgn=<value optimized out>, 
    offset=<value optimized out>, flags=4, sharedPainter=0x0, backingStore=0x142e5f0) at kernel/qwidget.cpp:5439
#23 0x00007fd4a503b2a9 in QWidgetPrivate::paintSiblingsRecursive (this=<value optimized out>, pdev=<value optimized out>, siblings=..., index=11, rgn=<value optimized out>, 
    offset=<value optimized out>, flags=4, sharedPainter=0x0, backingStore=0x142e5f0) at kernel/qwidget.cpp:5439
#24 0x00007fd4a503b2a9 in QWidgetPrivate::paintSiblingsRecursive (this=<value optimized out>, pdev=<value optimized out>, siblings=..., index=14, rgn=<value optimized out>, 
    offset=<value optimized out>, flags=4, sharedPainter=0x0, backingStore=0x142e5f0) at kernel/qwidget.cpp:5439
#25 0x00007fd4a503b2a9 in QWidgetPrivate::paintSiblingsRecursive (this=<value optimized out>, pdev=<value optimized out>, siblings=..., index=15, rgn=<value optimized out>, 
    offset=<value optimized out>, flags=4, sharedPainter=0x0, backingStore=0x142e5f0) at kernel/qwidget.cpp:5439
#26 0x00007fd4a503b2a9 in QWidgetPrivate::paintSiblingsRecursive (this=<value optimized out>, pdev=<value optimized out>, siblings=..., index=16, rgn=<value optimized out>, 
    offset=<value optimized out>, flags=4, sharedPainter=0x0, backingStore=0x142e5f0) at kernel/qwidget.cpp:5439
#27 0x00007fd4a503a53a in QWidgetPrivate::drawWidget (this=0x1571710, pdev=<value optimized out>, rgn=..., offset=<value optimized out>, flags=<value optimized out>, sharedPainter=0x0, 
    backingStore=0x142e5f0) at kernel/qwidget.cpp:5388
#28 0x00007fd4a503b478 in QWidgetPrivate::paintSiblingsRecursive (this=<value optimized out>, pdev=<value optimized out>, siblings=..., index=1, rgn=<value optimized out>, 
    offset=<value optimized out>, flags=4, sharedPainter=0x0, backingStore=0x142e5f0) at kernel/qwidget.cpp:5452
#29 0x00007fd4a503a53a in QWidgetPrivate::drawWidget (this=0x1581f50, pdev=<value optimized out>, rgn=..., offset=<value optimized out>, flags=<value optimized out>, sharedPainter=0x0, 
    backingStore=0x142e5f0) at kernel/qwidget.cpp:5388
#30 0x00007fd4a503b478 in QWidgetPrivate::paintSiblingsRecursive (this=<value optimized out>, pdev=<value optimized out>, siblings=..., index=0, rgn=<value optimized out>, 
    offset=<value optimized out>, flags=4, sharedPainter=0x0, backingStore=0x142e5f0) at kernel/qwidget.cpp:5452
#31 0x00007fd4a503a53a in QWidgetPrivate::drawWidget (this=0x1582600, pdev=<value optimized out>, rgn=..., offset=<value optimized out>, flags=<value optimized out>, sharedPainter=0x0, 
    backingStore=0x142e5f0) at kernel/qwidget.cpp:5388
#32 0x00007fd4a503b478 in QWidgetPrivate::paintSiblingsRecursive (this=<value optimized out>, pdev=<value optimized out>, siblings=..., index=0, rgn=<value optimized out>, 
    offset=<value optimized out>, flags=4, sharedPainter=0x0, backingStore=0x142e5f0) at kernel/qwidget.cpp:5452
#33 0x00007fd4a503a53a in QWidgetPrivate::drawWidget (this=0x1582350, pdev=<value optimized out>, rgn=..., offset=<value optimized out>, flags=<value optimized out>, sharedPainter=0x0, 
    backingStore=0x142e5f0) at kernel/qwidget.cpp:5388
#34 0x00007fd4a503b478 in QWidgetPrivate::paintSiblingsRecursive (this=<value optimized out>, pdev=<value optimized out>, siblings=..., index=8, rgn=<value optimized out>, 
    offset=<value optimized out>, flags=4, sharedPainter=0x0, backingStore=0x142e5f0) at kernel/qwidget.cpp:5452
#35 0x00007fd4a503b2a9 in QWidgetPrivate::paintSiblingsRecursive (this=<value optimized out>, pdev=<value optimized out>, siblings=..., index=10, rgn=<value optimized out>, 
    offset=<value optimized out>, flags=4, sharedPainter=0x0, backingStore=0x142e5f0) at kernel/qwidget.cpp:5439
#36 0x00007fd4a503a53a in QWidgetPrivate::drawWidget (this=0x1462680, pdev=<value optimized out>, rgn=..., offset=<value optimized out>, flags=<value optimized out>, sharedPainter=0x0, 
    backingStore=0x142e5f0) at kernel/qwidget.cpp:5388
#37 0x00007fd4a503b478 in QWidgetPrivate::paintSiblingsRecursive (this=<value optimized out>, pdev=<value optimized out>, siblings=..., index=5, rgn=<value optimized out>, 
    offset=<value optimized out>, flags=4, sharedPainter=0x0, backingStore=0x142e5f0) at kernel/qwidget.cpp:5452
#38 0x00007fd4a503a53a in QWidgetPrivate::drawWidget (this=0x1459050, pdev=<value optimized out>, rgn=..., offset=<value optimized out>, flags=<value optimized out>, sharedPainter=0x0, 
    backingStore=0x142e5f0) at kernel/qwidget.cpp:5388
#39 0x00007fd4a503b478 in QWidgetPrivate::paintSiblingsRecursive (this=<value optimized out>, pdev=<value optimized out>, siblings=..., index=13, rgn=<value optimized out>, 
    offset=<value optimized out>, flags=4, sharedPainter=0x0, backingStore=0x142e5f0) at kernel/qwidget.cpp:5452
#40 0x00007fd4a503a53a in QWidgetPrivate::drawWidget (this=0x11c5220, pdev=<value optimized out>, rgn=..., offset=<value optimized out>, flags=<value optimized out>, sharedPainter=0x0, 
    backingStore=0x142e5f0) at kernel/qwidget.cpp:5388
#41 0x00007fd4a51f48c5 in QWidgetBackingStore::sync (this=0x142e5f0) at painting/qbackingstore.cpp:1291
#42 0x00007fd4a502bb60 in QWidgetPrivate::syncBackingStore (this=0x11c5220) at kernel/qwidget.cpp:1672
#43 0x00007fd4a5032865 in QWidget::event (this=0x11c3bf0, event=0x181b0a0) at kernel/qwidget.cpp:8291
#44 0x00007fd4a53f4cab in QMainWindow::event (this=0x11c3bf0, event=0x181b0a0) at widgets/qmainwindow.cpp:1433
#45 0x00007fd4a5dfe6f3 in KXmlGuiWindow::event (this=0x7fff1ef51990, ev=0x1) at ../../kdeui/xmlgui/kxmlguiwindow.cpp:131
#46 0x00007fd4a4fdc22c in QApplicationPrivate::notify_helper (this=0x1101020, receiver=0x11c3bf0, e=0x181b0a0) at kernel/qapplication.cpp:4300
#47 0x00007fd4a4fe26fb in QApplication::notify (this=0x7fff1ef569e0, receiver=0x11c3bf0, e=0x181b0a0) at kernel/qapplication.cpp:4183
#48 0x00007fd4a5ce7526 in KApplication::notify (this=0x7fff1ef569e0, receiver=0x11c3bf0, event=0x181b0a0) at ../../kdeui/kernel/kapplication.cpp:302
#49 0x00007fd4a43ef06c in QCoreApplication::notifyInternal (this=0x7fff1ef569e0, receiver=0x11c3bf0, event=0x181b0a0) at kernel/qcoreapplication.cpp:704
#50 0x00007fd4a43f17e7 in QCoreApplication::sendEvent (receiver=0x0, event_type=<value optimized out>, data=0x10d8860) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#51 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=<value optimized out>, data=0x10d8860) at kernel/qcoreapplication.cpp:1345
#52 0x00007fd4a44189d3 in QCoreApplication::sendPostedEvents (s=<value optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:220
#53 postEventSourceDispatch (s=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:276
#54 0x00007fd4a00e78c2 in g_main_dispatch (context=0x1103d20) at /build/buildd/glib2.0-2.24.0/glib/gmain.c:1960
#55 IA__g_main_context_dispatch (context=0x1103d20) at /build/buildd/glib2.0-2.24.0/glib/gmain.c:2513
#56 0x00007fd4a00eb748 in g_main_context_iterate (context=0x1103d20, block=<value optimized out>, dispatch=<value optimized out>, self=<value optimized out>)
    at /build/buildd/glib2.0-2.24.0/glib/gmain.c:2591
#57 0x00007fd4a00eb8fc in IA__g_main_context_iteration (context=0x1103d20, may_block=1) at /build/buildd/glib2.0-2.24.0/glib/gmain.c:2654
#58 0x00007fd4a4418513 in QEventDispatcherGlib::processEvents (this=0x10d83a0, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:412
#59 0x00007fd4a508c46e in QGuiEventDispatcherGlib::processEvents (this=0x7fff1ef51990, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#60 0x00007fd4a43ed992 in QEventLoop::processEvents (this=<value optimized out>, flags=) at kernel/qeventloop.cpp:149
#61 0x00007fd4a43edd6c in QEventLoop::exec (this=0x7fff1ef56930, flags=) at kernel/qeventloop.cpp:201
#62 0x00007fd4a43f1aab in QCoreApplication::exec () at kernel/qcoreapplication.cpp:981
#63 0x000000000043b1c5 in main (argc=<value optimized out>, argv=<value optimized out>) at ../../../../apps/dolphin/src/main.cpp:101

Reported using DrKonqi