Application that crashed: dolphin
Version of the application: 1.3
KDE Version: 4.3.1 (KDE 4.3.1)
Qt Version: 4.5.2
Operating System: Linux 2.6.28-15-generic i686
Distribution: Ubuntu 9.04

What I was doing when the application crashed:
Open a Dolphin Window, 
after open a USB Pendrive directory, 
CTRL+T open a Tab
Moving to my docs
Copy files to the pendrive
Dolphin Crash after the operation finalized

 -- Backtrace:
Application: Dolphin (dolphin), signal: Segmentation fault
[KCrash Handler]
#6  0xb67e4719 in QUrl (this=0xbfb91ce4, other=@0x8) at io/qurl.cpp:3936
#7  0xb7407189 in KUrl (this=0xbfb91ce4, _u=@0x8) at /build/buildd/kde4libs-4.3.1/kdecore/io/kurl.cpp:468
#8  0xb7ef57ae in KFileItem::url (this=0x86cc480) at /build/buildd/kde4libs-4.3.1/kio/kio/kfileitem.cpp:1271
#9  0xb7ee487f in KDirModel::indexForItem (this=0x84d3220, item=@0x86cc480) at /build/buildd/kde4libs-4.3.1/kio/kio/kdirmodel.cpp:919
#10 0xb7dc7f82 in KFilePreviewGenerator::Private::orderItems (this=0x84f16c0, items=@0xbfb91de8) at /build/buildd/kde4libs-4.3.1/kfile/kfilepreviewgenerator.cpp:1015
#11 0xb7dcbbe3 in KFilePreviewGenerator::Private::updateIcons (this=0x84f16c0, items=@0xbfb91e38) at /build/buildd/kde4libs-4.3.1/kfile/kfilepreviewgenerator.cpp:508
#12 0xb7dcbe58 in KFilePreviewGenerator::Private::delayedIconUpdate (this=0x84f16c0) at /build/buildd/kde4libs-4.3.1/kfile/kfilepreviewgenerator.cpp:1080
#13 0xb7dccefe in KFilePreviewGenerator::qt_metacall (this=0x84f1558, _c=QMetaObject::InvokeMetaMethod, _id=10, _a=0xbfb91ee8)
    at /build/buildd/kde4libs-4.3.1/obj-i486-linux-gnu/kfile/kfilepreviewgenerator.moc:95
#14 0xb68461b8 in QMetaObject::activate (sender=0x84f1bb8, from_signal_index=4, to_signal_index=4, argv=0x0) at kernel/qobject.cpp:3113
#15 0xb6846e42 in QMetaObject::activate (sender=0x84f1bb8, m=0xb6923904, local_signal_index=0, argv=0x0) at kernel/qobject.cpp:3187
#16 0xb6882687 in QTimer::timeout (this=0x84f1bb8) at .moc/release-shared/moc_qtimer.cpp:128
#17 0xb684c5ce in QTimer::timerEvent (this=0x84f1bb8, e=0xbfb9236c) at kernel/qtimer.cpp:261
#18 0xb684116f in QObject::event (this=0x84f1bb8, e=0xbfb9236c) at kernel/qobject.cpp:1075
#19 0xb6a47d3c in QApplicationPrivate::notify_helper (this=0x82e8158, receiver=0x84f1bb8, e=0xbfb9236c) at kernel/qapplication.cpp:4056
#20 0xb6a5003e in QApplication::notify (this=0xbfb92604, receiver=0x84f1bb8, e=0xbfb9236c) at kernel/qapplication.cpp:3603
#21 0xb778e85d in KApplication::notify (this=0xbfb92604, receiver=0x84f1bb8, event=0xbfb9236c) at /build/buildd/kde4libs-4.3.1/kdeui/kernel/kapplication.cpp:302
#22 0xb6830bcb in QCoreApplication::notifyInternal (this=0xbfb92604, receiver=0x84f1bb8, event=0xbfb9236c) at kernel/qcoreapplication.cpp:610
#23 0xb685fd51 in QTimerInfoList::activateTimers (this=0x82e3074) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:213
#24 0xb685c3a0 in timerSourceDispatch (source=0x82e3040) at kernel/qeventdispatcher_glib.cpp:165
#25 0xb5facb88 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#26 0xb5fb00eb in ?? () from /usr/lib/libglib-2.0.so.0
#27 0xb5fb0268 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#28 0xb685c2f8 in QEventDispatcherGlib::processEvents (this=0x82c2d10, flags={i = -1078385432}) at kernel/qeventdispatcher_glib.cpp:327
#29 0xb6ae9a75 in QGuiEventDispatcherGlib::processEvents (this=0x82c2d10, flags={i = -1078385384}) at kernel/qguieventdispatcher_glib.cpp:202
#30 0xb682f1fa in QEventLoop::processEvents (this=0xbfb92590, flags={i = -1078385320}) at kernel/qeventloop.cpp:149
#31 0xb682f642 in QEventLoop::exec (this=0xbfb92590, flags={i = -1078385256}) at kernel/qeventloop.cpp:201
#32 0xb6831ae9 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#33 0xb6a47bb7 in QApplication::exec () at kernel/qapplication.cpp:3525
#34 0x0807aaff in _start ()

Reported using DrKonqi