Version:           1.12.4 (using KDE 4.3.4)
Compiler:          GCC 4.4.2 
OS:                Linux
Installed from:    Archlinux Packages

This might be a duplicate of #194990. I wasn't sure, so played it safe. Can't reproduce currently.

Backtrace:

Application: KMail (kmail), signal: Segmentation fault
[KCrash Handler]
#6  0xb69d89a7 in KMMessage::bodyPart(DwBodyPart*, KMMessagePart*, bool) () from /usr/lib/libkmailprivate.so.4
#7  0xb6d4cf7d in (anonymous namespace)::AttachmentURLHandler::statusBarMessage(KUrl const&, KMReaderWin*) const () from /usr/lib/libkmailprivate.so.4
#8  0xb6d4cc2c in KMail::URLHandlerManager::statusBarMessage(KUrl const&, KMReaderWin*) const () from /usr/lib/libkmailprivate.so.4
#9  0xb6ae3c51 in KMReaderWin::slotUrlOn(QString const&) () from /usr/lib/libkmailprivate.so.4
#10 0xb6ae67b3 in KMReaderWin::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libkmailprivate.so.4
#11 0xb67488ac in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQtCore.so.4
#12 0xb67494e2 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib/libQtCore.so.4
#13 0xb50d5ef3 in KHTMLPart::onURL(QString const&) () from /usr/lib/libkhtml.so.5
#14 0xb50edd7a in KHTMLPart::overURL(QString const&, QString const&, bool) () from /usr/lib/libkhtml.so.5
#15 0xb50f0143 in KHTMLPart::handleMouseMoveEventOver(khtml::MouseMoveEvent*) () from /usr/lib/libkhtml.so.5
#16 0xb50f05fc in KHTMLPart::khtmlMouseMoveEvent(khtml::MouseMoveEvent*) () from /usr/lib/libkhtml.so.5
#17 0xb50d696f in KHTMLPart::customEvent(QEvent*) () from /usr/lib/libkhtml.so.5
#18 0xb6742cff in QObject::event(QEvent*) () from /usr/lib/libQtCore.so.4
#19 0xb5d8a3a4 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#20 0xb5d91a8c in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#21 0xb75065ca in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#22 0xb6732e8b in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#23 0xb50c8c21 in KHTMLView::mouseMoveEvent(QMouseEvent*) () from /usr/lib/libkhtml.so.5
#24 0xb5ddeaa3 in QWidget::event(QEvent*) () from /usr/lib/libQtGui.so.4
#25 0xb6184cd3 in QFrame::event(QEvent*) () from /usr/lib/libQtGui.so.4
#26 0xb50c539c in KHTMLView::widgetEvent(QEvent*) () from /usr/lib/libkhtml.so.5
#27 0xb50c5685 in KHTMLView::eventFilter(QObject*, QEvent*) () from /usr/lib/libkhtml.so.5
#28 0xb673203a in QCoreApplicationPrivate::sendThroughObjectEventFilters(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#29 0xb5d8a37c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#30 0xb5d923d0 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#31 0xb75065ca in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#32 0xb6732e8b in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#33 0xb5d91393 in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&) () from /usr/lib/libQtGui.so.4
#34 0xb5dfee84 in ?? () from /usr/lib/libQtGui.so.4
#35 0xb5dfe365 in QApplication::x11ProcessEvent(_XEvent*) () from /usr/lib/libQtGui.so.4
#36 0xb5e28a52 in ?? () from /usr/lib/libQtGui.so.4
#37 0xb3eb4328 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#38 0xb3eb7ba0 in g_main_context_iterate () from /usr/lib/libglib-2.0.so.0
#39 0xb3eb7cd3 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#40 0xb675d5f5 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#41 0xb5e28185 in ?? () from /usr/lib/libQtGui.so.4
#42 0xb6731479 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#43 0xb67318ca in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#44 0xb6733d3f in QCoreApplication::exec() () from /usr/lib/libQtCore.so.4
#45 0xb5d8a227 in QApplication::exec() () from /usr/lib/libQtGui.so.4
#46 0x0804a6b2 in _start ()