Application that crashed: kmail
Version of the application: 1.12.4
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.x86_64 x86_64
Distribution: "Fedora release 12 (Constantine)"

What I was doing when the application crashed:
In a IMAP account, I tried to download the attachment and got this backtrace.
I've see that his report is inittially from KDE 3.5.5, It's still valid now that Kmail is a KDE 4 application?

Thanks for your attention.

 -- Backtrace:
Application: KMail (kmail), signal: Segmentation fault
82	T_PSEUDO (SYSCALL_SYMBOL, SYSCALL_NAME, SYSCALL_NARGS)
[KCrash Handler]
#5  c_str (this=0x14f10e0, msg=<value optimized out>, partSpecifier=<value optimized out>) at /usr/src/debug/kdepim-4.3.4/mimelib/mimelib/string.h:618
#6  partId (this=0x14f10e0, msg=<value optimized out>, partSpecifier=<value optimized out>) at /usr/src/debug/kdepim-4.3.4/mimelib/mimelib/msgcmp.h:259
#7  KMLoadPartsCommand::slotPartRetrieved (this=0x14f10e0, msg=<value optimized out>, partSpecifier=<value optimized out>) at /usr/src/debug/kdepim-4.3.4/kmail/kmcommands.cpp:2766
#8  0x00007f6bda67cbb6 in KMLoadPartsCommand::qt_metacall (this=0x14f10e0, _c=InvokeMetaMethod, _id=<value optimized out>, _a=0x7fff69355e30)
    at /usr/src/debug/kdepim-4.3.4/x86_64-redhat-linux-gnu/kmail/kmcommands.moc:1858
#9  0x000000397215408c in QMetaObject::activate (sender=0x5daa150, from_signal_index=<value optimized out>, to_signal_index=<value optimized out>, argv=0x7fff69355e30) at kernel/qobject.cpp:3112
#10 0x00007f6bda6ca8b7 in KMail::FolderJob::messageUpdated (this=<value optimized out>, _t1=0x5a48340, _t2=<value optimized out>)
    at /usr/src/debug/kdepim-4.3.4/x86_64-redhat-linux-gnu/kmail/folderjob.moc:106
#11 0x00007f6bda6d66ce in KMail::ImapJob::slotGetMessageResult (this=0x5daa150, job=<value optimized out>) at /usr/src/debug/kdepim-4.3.4/kmail/imapjob.cpp:476
#12 0x00007f6bda6da9fb in KMail::ImapJob::qt_metacall (this=0x5daa150, _c=InvokeMetaMethod, _id=<value optimized out>, _a=0x7fff69356040)
    at /usr/src/debug/kdepim-4.3.4/x86_64-redhat-linux-gnu/kmail/imapjob.moc:82
#13 0x000000397215408c in QMetaObject::activate (sender=0x2c67f40, from_signal_index=<value optimized out>, to_signal_index=<value optimized out>, argv=0x7fff69356040) at kernel/qobject.cpp:3112
#14 0x00000039756ef072 in KJob::result (this=<value optimized out>, _t1=0x2c67f40) at /usr/src/debug/kdelibs-4.3.4/x86_64-redhat-linux-gnu/kdecore/kjob.moc:188
#15 0x00000039756ef40f in KJob::emitResult (this=0x2c67f40) at /usr/src/debug/kdelibs-4.3.4/kdecore/jobs/kjob.cpp:304
#16 0x0000003ce30ee033 in KIO::SimpleJob::slotFinished (this=0x2c67f40) at /usr/src/debug/kdelibs-4.3.4/kio/kio/job.cpp:477
#17 0x0000003ce30ee4f3 in KIO::TransferJob::slotFinished (this=0x2c67f40) at /usr/src/debug/kdelibs-4.3.4/kio/kio/job.cpp:948
#18 0x0000003ce30ece11 in KIO::TransferJob::qt_metacall (this=0x2c67f40, _c=InvokeMetaMethod, _id=<value optimized out>, _a=0x7fff69356460)
    at /usr/src/debug/kdelibs-4.3.4/x86_64-redhat-linux-gnu/kio/jobclasses.moc:343
#19 0x000000397215408c in QMetaObject::activate (sender=0x2371420, from_signal_index=<value optimized out>, to_signal_index=<value optimized out>, argv=0x0) at kernel/qobject.cpp:3112
#20 0x0000003ce31b0541 in KIO::SlaveInterface::dispatch (this=0x2371420, _cmd=104, rawdata=...) at /usr/src/debug/kdelibs-4.3.4/kio/kio/slaveinterface.cpp:175
#21 0x0000003ce31ace23 in KIO::SlaveInterface::dispatch (this=0x2371420) at /usr/src/debug/kdelibs-4.3.4/kio/kio/slaveinterface.cpp:91
#22 0x0000003ce319fc7d in KIO::Slave::gotInput (this=0x2371420) at /usr/src/debug/kdelibs-4.3.4/kio/kio/slave.cpp:322
#23 0x0000003ce31a1d8c in KIO::Slave::qt_metacall (this=0x2371420, _c=InvokeMetaMethod, _id=<value optimized out>, _a=0x7fff69356820)
    at /usr/src/debug/kdelibs-4.3.4/x86_64-redhat-linux-gnu/kio/slave.moc:76
#24 0x000000397215408c in QMetaObject::activate (sender=0x230d860, from_signal_index=<value optimized out>, to_signal_index=<value optimized out>, argv=0x0) at kernel/qobject.cpp:3112
#25 0x0000003ce30bb207 in KIO::ConnectionPrivate::dequeue (this=0x230db90) at /usr/src/debug/kdelibs-4.3.4/kio/kio/connection.cpp:82
#26 0x0000003ce30bb31d in KIO::Connection::qt_metacall (this=0x230d860, _c=InvokeMetaMethod, _id=<value optimized out>, _a=0x27eb320)
    at /usr/src/debug/kdelibs-4.3.4/x86_64-redhat-linux-gnu/kio/connection.moc:73
#27 0x000000397214e401 in QObject::event (this=0x230d860, e=0x5a43c50) at kernel/qobject.cpp:1110
#28 0x0000003ce0d8f65c in QApplicationPrivate::notify_helper (this=0x149dcf0, receiver=0x230d860, e=0x5a43c50) at kernel/qapplication.cpp:4065
#29 0x0000003ce0d968ce in QApplication::notify (this=<value optimized out>, receiver=0x230d860, e=0x5a43c50) at kernel/qapplication.cpp:4030
#30 0x0000003ce1a11a66 in KApplication::notify (this=0x7fff693572d0, receiver=0x230d860, event=0x5a43c50) at /usr/src/debug/kdelibs-4.3.4/kdeui/kernel/kapplication.cpp:302
#31 0x000000397213ee6c in QCoreApplication::notifyInternal (this=0x7fff693572d0, receiver=0x230d860, event=0x5a43c50) at kernel/qcoreapplication.cpp:610
#32 0x000000397213fa42 in sendEvent (receiver=0x0, event_type=<value optimized out>, data=0x1460920) at kernel/qcoreapplication.h:213
#33 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=<value optimized out>, data=0x1460920) at kernel/qcoreapplication.cpp:1247
#34 0x0000003972167573 in sendPostedEvents (s=<value optimized out>) at kernel/qcoreapplication.h:218
#35 postEventSourceDispatch (s=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:210
#36 0x000000396b43922e in g_main_context_dispatch () from /lib64/libglib-2.0.so.0
#37 0x000000396b43cc18 in ?? () from /lib64/libglib-2.0.so.0
#38 0x000000396b43cd3a in g_main_context_iteration () from /lib64/libglib-2.0.so.0
#39 0x00000039721671e6 in QEventDispatcherGlib::processEvents (this=0x1460190, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:327
#40 0x0000003ce0e21ffe in QGuiEventDispatcherGlib::processEvents (this=<value optimized out>, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:202
#41 0x000000397213d772 in QEventLoop::processEvents (this=<value optimized out>, flags=...) at kernel/qeventloop.cpp:149
#42 0x000000397213db44 in QEventLoop::exec (this=0x7fff69357120, flags=...) at kernel/qeventloop.cpp:201
#43 0x000000397213fcd9 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#44 0x0000000000402e69 in main (argc=<value optimized out>, argv=<value optimized out>) at /usr/src/debug/kdepim-4.3.4/kmail/main.cpp:146

Reported using DrKonqi