Version:            (using KDE 4.2.2)
Installed from:    Fedora RPMs

No plugins loaded.

kdebase version: kdebase-4.2.2-2.fc11.x86_64

Step to Reproduce:
#1. navigate to any folder, move a file to trash by hitting [del]
#2. use another application other than dolphin itself to create a file of the same name & path of the one remove in #1
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E.g. 
i move a file called  "abc" in ~/test/ for #1
i open a terminal, echo "" > ~/test/abc
to make another "abc" file
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#3. now switch back to dolphin and press ctrl-z to undo change,  dolphin claims that file already exists and a information notification pop up (knotify4?) an message of "Moving file.."
#4. click on the stop button (black square next to the pause button)
#5. dolphin crashes
#6. Notification stays there forever

Expected:
dolphin prompt for overwrite Y/N ?
Notification should disappear


Backtrace:
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Application: Dolphin (dolphin), signal SIGSEGV
0x0000003b772a5151 in nanosleep () from /lib64/libc.so.6
[Current thread is 1 (Thread 0x7f3cb84d2820 (LWP 2196))]

Thread 2 (Thread 0x7f3cb1505910 (LWP 3481)):
#0  0x0000003b772d9092 in select () from /lib64/libc.so.6
#1  0x0000003c66f21691 in ?? () from /usr/lib64/libQtCore.so.4
#2  0x0000003c66e5a221 in ?? () from /usr/lib64/libQtCore.so.4
#3  0x0000003b77e0687a in start_thread () from /lib64/libpthread.so.0
#4  0x0000003b772e04cd in clone () from /lib64/libc.so.6
#5  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f3cb84d2820 (LWP 2196)):
[KCrash Handler]
#5  0x0000000100000007 in ?? ()
#6  0x0000003c690e98e9 in KJob::kill(KJob::KillVerbosity) () from /usr/lib64/libkdecore.so.5
#7  0x0000003c69c01065 in KUiServerJobTracker::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib64/libkdeui.so.5
#8  0x0000003c66f58612 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib64/libQtCore.so.4
#9  0x0000003c69d42a88 in ?? () from /usr/lib64/libkdeui.so.5
#10 0x0000003c67c23314 in ?? () from /usr/lib64/libQtDBus.so.4
#11 0x0000003c67c2b02f in ?? () from /usr/lib64/libQtDBus.so.4
#12 0x0000003c66f526c9 in QObject::event(QEvent*) () from /usr/lib64/libQtCore.so.4
#13 0x0000003c6858deac in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib64/libQtGui.so.4
#14 0x0000003c685954de in QApplication::notify(QObject*, QEvent*) () from /usr/lib64/libQtGui.so.4
#15 0x0000003c69c05c66 in KApplication::notify(QObject*, QEvent*) () from /usr/lib64/libkdeui.so.5
#16 0x0000003c66f42b7c in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib64/libQtCore.so.4
#17 0x0000003c66f4366a in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () from /usr/lib64/libQtCore.so.4
#18 0x0000003c66f6c333 in ?? () from /usr/lib64/libQtCore.so.4
#19 0x0000003b7963818e in g_main_context_dispatch () from /lib64/libglib-2.0.so.0
#20 0x0000003b7963b8e8 in ?? () from /lib64/libglib-2.0.so.0
#21 0x0000003b7963ba5c in g_main_context_iteration () from /lib64/libglib-2.0.so.0
#22 0x0000003c66f6bfa6 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4
#23 0x0000003c686220de in ?? () from /usr/lib64/libQtGui.so.4
#24 0x0000003c66f41452 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4
#25 0x0000003c66f41824 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4
#26 0x0000003c66f43919 in QCoreApplication::exec() () from /usr/lib64/libQtCore.so.4
#27 0x000000000043fb95 in _start ()

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