Version:           1.10.3 (using KDE 4.1.3)
OS:                Linux
Installed from:    Ubuntu Packages

Here is the report I got :

Application : KMail (kmail), signal SIGSEGV
[Thread debugging using libthread_db enabled]
[New Thread 0xb41b06c0 (LWP 1349)]
[New Thread 0xaf80cb90 (LWP 25985)]
[KCrash handler]
#6  0xb7834ea1 in KMail::ISubject::notify (this=0xa50cba4)
    at /build/buildd/kdepim-4.1.3/kmail/isubject.cpp:30
#7  0xb74a1646 in KMMessage::updateBodyPart (this=0xa50cb88, partSpecifier=
      {static null = {<No data fields>}, static shared_null = {ref = {_q_value = 23563}, alloc = 0, size = 0, data = 0xb7fa29ba, clean = 0, simpletext = 0, righttoleft = 0, asciiCache = 0, capacity = 0, reserved = 0, array = {0}}, static shared_empty = {ref = {_q_value = 857}, alloc = 0, size = 0, data = 0xb7fa29ce, clean = 0, simpletext = 0, righttoleft = 0, asciiCache = 0, capacity = 0, reserved = 0, array = {0}}, d = 0xbfcd56bc, static codecForCStrings = 0x0}, 
    data=@0xa91a140) at /build/buildd/kdepim-4.1.3/kmail/kmmessage.cpp:4178
#8  0xb780895d in KMail::ImapJob::slotGetMessageResult (this=0xa72be48, 
    job=0x9f24140) at /build/buildd/kdepim-4.1.3/kmail/imapjob.cpp:435
#9  0xb780cee4 in KMail::ImapJob::qt_metacall (this=0xa72be48, 
    _c=QMetaObject::InvokeMetaMethod, _id=0, _a=0xbfcd57cc)
    at /build/buildd/kdepim-4.1.3/obj-i486-linux-gnu/kmail/imapjob.moc:81
#10 0xb7ed1a60 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#11 0xb7ed27e2 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#12 0xb7c36283 in KJob::result (this=0x9f24140, _t1=0x9f24140)
    at /build/buildd/kde4libs-4.1.3/obj-i486-linux-gnu/kdecore/kjob.moc:186
#13 0xb7c36792 in KJob::emitResult (this=0x9f24140)
    at /build/buildd/kde4libs-4.1.3/kdecore/jobs/kjob.cpp:290
#14 0xb53d08c5 in KIO::SimpleJob::slotFinished (this=0x9f24140)
    at /build/buildd/kde4libs-4.1.3/kio/kio/job.cpp:498
#15 0xb53d7353 in KIO::TransferJob::slotFinished (this=0x9f24140)
    at /build/buildd/kde4libs-4.1.3/kio/kio/job.cpp:967
#16 0xb53d812b in KIO::TransferJob::qt_metacall (this=0x9f24140, 
    _c=QMetaObject::InvokeMetaMethod, _id=7, _a=0xbfcd5a08)
    at /build/buildd/kde4libs-4.1.3/obj-i486-linux-gnu/kio/jobclasses.moc:336
#17 0xb7ed1a60 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#18 0xb7ed27e2 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#19 0xb5496f27 in KIO::SlaveInterface::finished (this=0x9c139c0)
    at /build/buildd/kde4libs-4.1.3/obj-i486-linux-gnu/kio/slaveinterface.moc:161
#20 0xb549ab97 in KIO::SlaveInterface::dispatch (this=0x9c139c0, _cmd=104, 
    rawdata=@0xbfcd5bd4)
    at /build/buildd/kde4libs-4.1.3/kio/kio/slaveinterface.cpp:175
#21 0xb54976a7 in KIO::SlaveInterface::dispatch (this=0x9c139c0)
    at /build/buildd/kde4libs-4.1.3/kio/kio/slaveinterface.cpp:90
#22 0xb54876cd in KIO::Slave::gotInput (this=0x9c139c0)
    at /build/buildd/kde4libs-4.1.3/kio/kio/slave.cpp:322
#23 0xb548a113 in KIO::Slave::qt_metacall (this=0x9c139c0, 
    _c=QMetaObject::InvokeMetaMethod, _id=2, _a=0xbfcd5ce8)
    at /build/buildd/kde4libs-4.1.3/obj-i486-linux-gnu/kio/slave.moc:75
#24 0xb7ed1a60 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#25 0xb7ed27e2 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#26 0xb53978f7 in KIO::Connection::readyRead (this=0xa954d00)
    at /build/buildd/kde4libs-4.1.3/obj-i486-linux-gnu/kio/connection.moc:84
#27 0xb53999c9 in KIO::ConnectionPrivate::dequeue (this=0xa47ab88)
    at /build/buildd/kde4libs-4.1.3/kio/kio/connection.cpp:82
#28 0xb5399b56 in KIO::Connection::qt_metacall (this=0xa954d00, 
    _c=QMetaObject::InvokeMetaMethod, _id=1, _a=0x9dd8ae8)
    at /build/buildd/kde4libs-4.1.3/obj-i486-linux-gnu/kio/connection.moc:72
#29 0xb7ecabfb in QMetaCallEvent::placeMetaCall ()
   from /usr/lib/libQtCore.so.4
#30 0xb7ecc771 in QObject::event () from /usr/lib/libQtCore.so.4
#31 0xb67ab8ec in QApplicationPrivate::notify_helper ()
   from /usr/lib/libQtGui.so.4
#32 0xb67b372e in QApplication::notify () from /usr/lib/libQtGui.so.4
#33 0xb7142b2d in KApplication::notify (this=0xbfcd6538, receiver=0xa954d00, 
    event=0xa57a768)
    at /build/buildd/kde4libs-4.1.3/kdeui/kernel/kapplication.cpp:311
#34 0xb7ebce61 in QCoreApplication::notifyInternal ()
   from /usr/lib/libQtCore.so.4
#35 0xb7ebdae5 in QCoreApplicationPrivate::sendPostedEvents ()
   from /usr/lib/libQtCore.so.4
#36 0xb7ebdcdd in QCoreApplication::sendPostedEvents ()
   from /usr/lib/libQtCore.so.4
#37 0xb7ee782f in ?? () from /usr/lib/libQtCore.so.4
#38 0xb63716f8 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#39 0xb6374da3 in ?? () from /usr/lib/libglib-2.0.so.0
#40 0xb6374f61 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#41 0xb7ee7478 in QEventDispatcherGlib::processEvents ()
   from /usr/lib/libQtCore.so.4
#42 0xb6845ea5 in ?? () from /usr/lib/libQtGui.so.4
#43 0xb7ebb52a in QEventLoop::processEvents () from /usr/lib/libQtCore.so.4
#44 0xb7ebb6ea in QEventLoop::exec () from /usr/lib/libQtCore.so.4
#45 0xb7ebdda5 in QCoreApplication::exec () from /usr/lib/libQtCore.so.4
#46 0xb67ab767 in QApplication::exec () from /usr/lib/libQtGui.so.4
#47 0x0804a6c0 in main (argc=-1212928472, argv=0xa750760)
    at /build/buildd/kdepim-4.1.3/kmail/main.cpp:146
#0  0xb7fd4430 in __kernel_vsyscall ()