Application that crashed: kdevdesigner
Version of the application: 0.2
KDE Version: 4.3.4 (KDE 4.3.4)
Qt Version: 4.5.3
Operating System: Linux 2.6.31.12-174.2.3.fc12.i686.PAE i686
Distribution: "Fedora release 12 (Constantine)"

What I was doing when the application crashed:
I wanted to test KDevelop Designer and created a new project, saved it, created a new main window with one button. Saving the late one caused the crash.

 -- Backtrace:
Application: KDevDesigner (kdevdesigner), signal: Segmentation fault
[KCrash Handler]
#6  0x007ae461 in KParts::ReadWritePart::slotUploadFinished(KIO::Job*) () from /usr/lib/libkparts.so.2
#7  0x007b0ab2 in KParts::ReadWritePart::qt_invoke(int, QUObject*) () from /usr/lib/libkparts.so.2
#8  0x00583f6c in KInterfaceDesigner::Designer::qt_invoke(int, QUObject*) () from /usr/lib/libkinterfacedesigner.so.0
#9  0x00e9c903 in KDevDesignerPart::qt_invoke(int, QUObject*) () from /usr/lib/kde3/libkdevdesignerpart.so
#10 0x0674e482 in QObject::activate_signal(QConnectionList*, QUObject*) () from /usr/lib/qt-3.3/lib/libqt-mt.so.3
#11 0x0748b966 in KIO::Job::result(KIO::Job*) () from /usr/lib/libkio.so.4
#12 0x074d5fde in KIO::Job::emitResult() () from /usr/lib/libkio.so.4
#13 0x074ef63b in KIO::FileCopyJob::slotResult(KIO::Job*) () from /usr/lib/libkio.so.4
#14 0x074f7377 in KIO::FileCopyJob::qt_invoke(int, QUObject*) () from /usr/lib/libkio.so.4
#15 0x0674e482 in QObject::activate_signal(QConnectionList*, QUObject*) () from /usr/lib/qt-3.3/lib/libqt-mt.so.3
#16 0x0748b966 in KIO::Job::result(KIO::Job*) () from /usr/lib/libkio.so.4
#17 0x074d5fde in KIO::Job::emitResult() () from /usr/lib/libkio.so.4
#18 0x074d6cbf in KIO::SimpleJob::slotFinished() () from /usr/lib/libkio.so.4
#19 0x074d7335 in KIO::TransferJob::slotFinished() () from /usr/lib/libkio.so.4
#20 0x074cb258 in KIO::SimpleJob::qt_invoke(int, QUObject*) () from /usr/lib/libkio.so.4
#21 0x074cb373 in KIO::TransferJob::qt_invoke(int, QUObject*) () from /usr/lib/libkio.so.4
#22 0x0674e482 in QObject::activate_signal(QConnectionList*, QUObject*) () from /usr/lib/qt-3.3/lib/libqt-mt.so.3
#23 0x06ae2404 in QSignal::signal(QVariant const&) () from /usr/lib/qt-3.3/lib/libqt-mt.so.3
#24 0x0676e10c in QSignal::activate() () from /usr/lib/qt-3.3/lib/libqt-mt.so.3
#25 0x06776474 in QSingleShotTimer::event(QEvent*) () from /usr/lib/qt-3.3/lib/libqt-mt.so.3
#26 0x066e5c75 in QApplication::internalNotify(QObject*, QEvent*) () from /usr/lib/qt-3.3/lib/libqt-mt.so.3
#27 0x066e7983 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/qt-3.3/lib/libqt-mt.so.3
#28 0x06ef67ec in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdecore.so.4
#29 0x066da2eb in QEventLoop::activateTimers() () from /usr/lib/qt-3.3/lib/libqt-mt.so.3
#30 0x0668ea72 in QEventLoop::processEvents(unsigned int) () from /usr/lib/qt-3.3/lib/libqt-mt.so.3
#31 0x06700710 in QEventLoop::enterLoop() () from /usr/lib/qt-3.3/lib/libqt-mt.so.3
#32 0x067005b7 in QEventLoop::exec() () from /usr/lib/qt-3.3/lib/libqt-mt.so.3
#33 0x066e6340 in QApplication::exec() () from /usr/lib/qt-3.3/lib/libqt-mt.so.3
#34 0x0804f9ef in QWidget::setUpdatesEnabled(bool) ()
#35 0x003bbbb6 in __libc_start_main () from /lib/libc.so.6
#36 0x0804e491 in QWidget::setUpdatesEnabled(bool) ()

Reported using DrKonqi