Application that crashed: kmail
Version of the application: 1.12.3
KDE Version: 4.3.3 (KDE 4.3.3)
Qt Version: 4.6.0
Operating System: Linux 2.6.31-15-generic i686
Distribution: Ubuntu 9.10

What I was doing when the application crashed:
If by any chance this is a duplicate of the famous. Kmail crashes on loosing network connection, please not that since 4.3.3. for me these crashes do not occur on loosing a network connection. At least not locally. Either it is that Kmail believes it lost the network connection or may be it is related to a problem with my email provider (not so likelly, but possible). Just to help to recover this.

 -- Backtrace:
Application: KMail (kmail), signal: Segmentation fault
[Current thread is 1 (Thread 0xb775e760 (LWP 2255))]

Thread 2 (Thread 0xaddf8b70 (LWP 5141)):
#0  0x00eac422 in __kernel_vsyscall ()
#1  0x039d9e15 in pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/i386/i686/../i486/pthread_cond_wait.S:122
#2  0x00d9178d in __pthread_cond_wait (cond=0x10a27508, mutex=0x10a274f0) at forward.c:139
#3  0x009b1807 in QWaitConditionPrivate::wait (this=0x106c4f20, mutex=0x106c4f1c, time=4294967295) at thread/qwaitcondition_unix.cpp:87
#4  QWaitCondition::wait (this=0x106c4f20, mutex=0x106c4f1c, time=4294967295) at thread/qwaitcondition_unix.cpp:159
#5  0x091c1052 in QHostInfoAgent::run (this=0x106c4f10) at kernel/qhostinfo.cpp:252
#6  0x009b08ae in QThreadPrivate::start (arg=0x106c4f10) at thread/qthread_unix.cpp:244
#7  0x039d580e in start_thread (arg=0xaddf8b70) at pthread_create.c:300
#8  0x00d847ee in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:130

Thread 1 (Thread 0xb775e760 (LWP 2255)):
[KCrash Handler]
#6  0x00000001 in ?? ()
#7  0x0121a27b in KMCommand::qt_metacall (this=0x1, _c=251007256, _id=8, _a=0xbfd61c9c) at ./kmcommands.moc:86
#8  0x0121a922 in KMReplyToCommand::qt_metacall (this=0xef61118, _c=QMetaObject::InvokeMetaMethod, _id=8, _a=0xbfd61c9c) at ./kmcommands.moc:844
#9  0x00ab6c3a in QMetaObject::metacall (object=0xef61118, cl=280206512, idx=8, argv=0xbfd61c9c) at kernel/qmetaobject.cpp:237
#10 0x00ac56fb in QMetaObject::activate (sender=0xe742978, m=0xbc3188, local_signal_index=0, argv=0x0) at kernel/qobject.cpp:3398
#11 0x00acce47 in QSingleShotTimer::timeout (this=0xe742978) at .moc/release-shared/qtimer.moc:82
#12 0x00accf5c in QSingleShotTimer::timerEvent (this=0xe742978) at kernel/qtimer.cpp:308
#13 0x00ac21b4 in QObject::event (this=0xe742978, e=0xef611a0) at kernel/qobject.cpp:1210
#14 0x0758cc6c in QApplicationPrivate::notify_helper (this=0xa04d6c0, receiver=0xe742978, e=0xbfd62140) at kernel/qapplication.cpp:4277
#15 0x07593a1e in QApplication::notify (this=0xbfd62540, receiver=0xe742978, e=0xbfd62140) at kernel/qapplication.cpp:3702
#16 0x002e314a in KApplication::notify (this=0xbfd62540, receiver=0xe742978, event=0xbfd62140) at ../../kdeui/kernel/kapplication.cpp:302
#17 0x00ab19cb in QCoreApplication::notifyInternal (this=0xbfd62540, receiver=0xe742978, event=0xbfd62140) at kernel/qcoreapplication.cpp:704
#18 0x00ae0b86 in QCoreApplication::sendEvent (this=0xa04db3c) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#19 QTimerInfoList::activateTimers (this=0xa04db3c) at kernel/qeventdispatcher_unix.cpp:603
#20 0x00add837 in timerSourceDispatch (source=0xa04db70) at kernel/qeventdispatcher_glib.cpp:184
#21 idleTimerSourceDispatch (source=0xa04db70) at kernel/qeventdispatcher_glib.cpp:231
#22 0x01ac8e78 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#23 0x01acc720 in ?? () from /lib/libglib-2.0.so.0
#24 0x01acc853 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#25 0x00add4f5 in QEventDispatcherGlib::processEvents (this=0x9f28880, flags=...) at kernel/qeventdispatcher_glib.cpp:407
#26 0x07640635 in QGuiEventDispatcherGlib::processEvents (this=0x9f28880, flags=...) at kernel/qguieventdispatcher_glib.cpp:202
#27 0x00ab0019 in QEventLoop::processEvents (this=0xbfd62404, flags=) at kernel/qeventloop.cpp:149
#28 0x00ab046a in QEventLoop::exec (this=0xbfd62404, flags=...) at kernel/qeventloop.cpp:201
#29 0x00ab462f in QCoreApplication::exec () at kernel/qcoreapplication.cpp:981
#30 0x0758cd07 in QApplication::exec () at kernel/qapplication.cpp:3616
#31 0x0804a702 in main (argc=3, argv=0xbfd626f4) at ../../kmail/main.cpp:146

Reported using DrKonqi