Version:            (using KDE 4.0.1)
Installed from:    Compiled From Sources
Compiler:          gcc (GCC) 3.4.6 (Gentoo 3.4.6-r1, ssp-3.4.5-1.0, pie-8.7.9) -march=athlon-xp -O3 -pipe -j2
OS:                Linux

While cleaning up some directories, I used Dolphin to move some project files from one directory to another. The directories were accidentally in two different partitions, some files were too big so I cancelled the move. Some big files were already moved but I wanted to keep them together so I moved them back.
One file had been copied partially, so the original file still existed, and I was asked to skip or overwrite. I selected 'skip' to keep the original, and then Dolphin crashed.
Tried it again, same crash.
The shell command mv $new_dir/* $old_dir worked fine.

Stack trace:

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Using host libthread_db library "/lib/libthread_db.so.1".
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[Thread debugging using libthread_db enabled]
[New Thread 0xb600d6c0 (LWP 7756)]
[New Thread 0xb4960b90 (LWP 7757)]
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[KCrash handler]
#6  0xb7e89300 in QUrl::operator= () from /usr/lib/qt4/libQtCore.so.4
#7  0xb7c556e9 in KUrl::operator= () from /usr/kde/4.0/lib/libkdecore.so.5
#8  0xb766b01a in KIO::CopyJobPrivate::statCurrentSrc ()
   from /usr/kde/4.0/lib/libkio.so.5
#9  0xb766bd86 in KIO::CopyJobPrivate::skipSrc ()
   from /usr/kde/4.0/lib/libkio.so.5
#10 0xb766c81e in KIO::CopyJobPrivate::slotResultRenaming ()
   from /usr/kde/4.0/lib/libkio.so.5
#11 0xb766de4d in KIO::CopyJob::slotResult ()
   from /usr/kde/4.0/lib/libkio.so.5
#12 0xb76675c5 in KIO::CopyJob::qt_metacall ()
   from /usr/kde/4.0/lib/libkio.so.5
#13 0xb7edbfb9 in QMetaObject::activate () from /usr/lib/qt4/libQtCore.so.4
#14 0xb7edc532 in QMetaObject::activate () from /usr/lib/qt4/libQtCore.so.4
#15 0xb7c60c13 in KJob::result () from /usr/kde/4.0/lib/libkdecore.so.5
#16 0xb7c60e02 in KJob::emitResult () from /usr/kde/4.0/lib/libkdecore.so.5
#17 0xb7687268 in KIO::SimpleJob::slotFinished ()
   from /usr/kde/4.0/lib/libkio.so.5
#18 0xb7687453 in KIO::SimpleJob::slotError ()
   from /usr/kde/4.0/lib/libkio.so.5
#19 0xb768b2a6 in KIO::SimpleJob::qt_metacall ()
   from /usr/kde/4.0/lib/libkio.so.5
#20 0xb7edbfb9 in QMetaObject::activate () from /usr/lib/qt4/libQtCore.so.4
#21 0xb7edc532 in QMetaObject::activate () from /usr/lib/qt4/libQtCore.so.4
#22 0xb77417f4 in KIO::SlaveInterface::error ()
   from /usr/kde/4.0/lib/libkio.so.5
#23 0xb780f380 in KIO::SlaveConfig::staticMetaObject ()
   from /usr/kde/4.0/lib/libkio.so.5
#24 0xbf8f72e0 in ?? ()
#25 0x00000000 in ?? ()
#0  0xffffe410 in __kernel_vsyscall ()