Application: kmail (1.13.2)
KDE Platform Version: 4.4.2 (KDE 4.4.2)
Qt Version: 4.6.2
Operating System: Linux 2.6.32-22-generic x86_64
Distribution: Ubuntu 10.04 LTS

-- Information about the crash:
I restarted the IMAP4 Mailserver. KMail had shown an information that the Mailserver isn't available; then it crashed.

By the way: the assistent for error reporting (I think it is DrKonqi ?) has a bug too: the list of possible duplicate reports can't never be loaded; it fails with the following error:

Fehler beim Einholen der Fehlerbericht-Liste
Ungültige Fehlerliste: fehlerhafte Daten
Bitte warten Sie einen Augenblick und versuchen Sie es dann erneut.

I retried a few times (and with other bug-reports like for Dolphin), it never works.

 -- Backtrace:
Application: KMail (kmail), signal: Segmentation fault
[KCrash Handler]
#5  0x00007f436372bc71 in KPIM::ProgressItem::setComplete() () from /usr/lib/libkdepim.so.4
#6  0x00007f436b89df85 in ?? () from /usr/lib/libkmailprivate.so.4
#7  0x00007f436b8d0e1b in ?? () from /usr/lib/libkmailprivate.so.4
#8  0x00007f436b8d2725 in ?? () from /usr/lib/libkmailprivate.so.4
#9  0x00007f436a2d3e3f in QMetaObject::activate (sender=0x1bc4d40, m=<value optimized out>, local_signal_index=<value optimized out>, argv=0xa74a0) at kernel/qobject.cpp:3293
#10 0x00007f436c2c5b82 in KJob::result (this=0x200000001, _t1=0x1bc4d40) at ./kjob.moc:194
#11 0x00007f436c2c5e20 in KJob::emitResult (this=0x1bc4d40) at ../../kdecore/jobs/kjob.cpp:312
#12 0x00007f4366bb7503 in KIO::SimpleJob::slotFinished (this=0x1bc4d40) at ../../kio/kio/job.cpp:486
#13 0x00007f4366bb7640 in KIO::ListJob::slotFinished (this=0x1bc4d40) at ../../kio/kio/job.cpp:2505
#14 0x00007f4366bb5686 in KIO::SimpleJob::slotError (this=0x1bc4d40, err=<value optimized out>, errorText=...) at ../../kio/kio/job.cpp:498
#15 0x00007f4366bb57c8 in KIO::SimpleJob::qt_metacall (this=0x1bc4d40, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fffdd835660) at ./jobclasses.moc:170
#16 0x00007f4366bbb240 in KIO::ListJob::qt_metacall (this=0x200000001, _c=3716370560, _id=37492737, _a=0xa74a0) at ./jobclasses.moc:810
#17 0x00007f436a2d3e3f in QMetaObject::activate (sender=0x1c5fb20, m=<value optimized out>, local_signal_index=<value optimized out>, argv=0xa74a0) at kernel/qobject.cpp:3293
#18 0x00007f4366c742e6 in KIO::SlaveInterface::error (this=0x200000001, _t1=149, _t2=<value optimized out>) at ./slaveinterface.moc:159
#19 0x00007f4366c772ed in KIO::SlaveInterface::dispatch (this=0x1c5fb20, _cmd=102, rawdata=...) at ../../kio/kio/slaveinterface.cpp:208
#20 0x00007f4366c745e3 in KIO::SlaveInterface::dispatch (this=0x1c5fb20) at ../../kio/kio/slaveinterface.cpp:91
#21 0x00007f4366c68a46 in KIO::Slave::gotInput (this=0x1c5fb20) at ../../kio/kio/slave.cpp:324
#22 0x00007f4366c68c2c in KIO::Slave::qt_metacall (this=0x1c5fb20, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fffdd835a60) at ./slave.moc:82
#23 0x00007f436a2d3e3f in QMetaObject::activate (sender=0x1bbfd80, m=<value optimized out>, local_signal_index=<value optimized out>, argv=0xa74a0) at kernel/qobject.cpp:3293
#24 0x00007f4366b869d7 in KIO::ConnectionPrivate::dequeue (this=0x1f9d060) at ../../kio/kio/connection.cpp:82
#25 0x00007f4366b86afd in KIO::Connection::qt_metacall (this=0x1bbfd80, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x23d1f90) at ./connection.moc:79
#26 0x00007f436a2d0d49 in QObject::event (this=0x1bbfd80, e=0x1be82f0) at kernel/qobject.cpp:1248
#27 0x00007f436a79422c in QApplicationPrivate::notify_helper (this=0x179d6c0, receiver=0x1bbfd80, e=0x1be82f0) at kernel/qapplication.cpp:4300
#28 0x00007f436a79a6fb in QApplication::notify (this=0x7fffdd836680, receiver=0x1bbfd80, e=0x1be82f0) at kernel/qapplication.cpp:4183
#29 0x00007f436c896526 in KApplication::notify (this=0x7fffdd836680, receiver=0x1bbfd80, event=0x1be82f0) at ../../kdeui/kernel/kapplication.cpp:302
#30 0x00007f436a2c106c in QCoreApplication::notifyInternal (this=0x7fffdd836680, receiver=0x1bbfd80, event=0x1be82f0) at kernel/qcoreapplication.cpp:704
#31 0x00007f436a2c37e7 in QCoreApplication::sendEvent (receiver=0x0, event_type=<value optimized out>, data=0x17208b0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#32 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=<value optimized out>, data=0x17208b0) at kernel/qcoreapplication.cpp:1345
#33 0x00007f436a2ea9d3 in QCoreApplication::sendPostedEvents (s=<value optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:220
#34 postEventSourceDispatch (s=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:276
#35 0x00007f436132a8c2 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#36 0x00007f436132e748 in ?? () from /lib/libglib-2.0.so.0
#37 0x00007f436132e8fc in g_main_context_iteration () from /lib/libglib-2.0.so.0
#38 0x00007f436a2ea513 in QEventDispatcherGlib::processEvents (this=0x1720000, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:412
#39 0x00007f436a84446e in QGuiEventDispatcherGlib::processEvents (this=0x200000001, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#40 0x00007f436a2bf992 in QEventLoop::processEvents (this=<value optimized out>, flags=) at kernel/qeventloop.cpp:149
#41 0x00007f436a2bfd6c in QEventLoop::exec (this=0x7fffdd8364b0, flags=) at kernel/qeventloop.cpp:201
#42 0x00007f436a2c3aab in QCoreApplication::exec () at kernel/qcoreapplication.cpp:981
#43 0x0000000000403482 in _start ()

Reported using DrKonqi