Application that crashed: kontact
Version of the application: 4.3.1
KDE Version: 4.3.1 (KDE 4.3.1)
Qt Version: 4.5.2
Operating System: Linux 2.6.30-1-686 i686
Distribution: Debian GNU/Linux testing (squeeze)

What I was doing when the application crashed:
When I type a recipient email address inside the "to" section while writing a new mail, Kmail crashes.

 -- Backtrace:
Application: Kontact (kontact), signal: Segmentation fault
[KCrash Handler]
#6  0xb7f1b2a8 in KPIM::AddresseeLineEdit::slotLDAPSearchData(QList<KPIM::LdapResult> const&) () from /usr/lib/libkdepim.so.4
#7  0xb7f1c38a in KPIM::AddresseeLineEdit::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libkdepim.so.4
#8  0xb153738a in ?? () from /usr/lib/libkmailprivate.so.4
#9  0xb15abf3a in ?? () from /usr/lib/libkmailprivate.so.4
#10 0xb77eeb33 in QMetaObject::activate (sender=0x939fa30, from_signal_index=5, to_signal_index=5, argv=0xbfb10a5c) at kernel/qobject.cpp:3112
#11 0xb77ef782 in QMetaObject::activate (sender=0x939fa30, m=0xb7fa0248, local_signal_index=1, argv=0xbfb10a5c) at kernel/qobject.cpp:3186
#12 0xb7f1f613 in KPIM::LdapSearch::searchData(QList<KPIM::LdapResult> const&) () from /usr/lib/libkdepim.so.4
#13 0xb7f233af in KPIM::LdapSearch::slotDataTimer() () from /usr/lib/libkdepim.so.4
#14 0xb7f2343d in KPIM::LdapSearch::finish() () from /usr/lib/libkdepim.so.4
#15 0xb7f23480 in KPIM::LdapSearch::slotLDAPDone() () from /usr/lib/libkdepim.so.4
#16 0xb7f234ad in KPIM::LdapSearch::slotLDAPError(QString const&) () from /usr/lib/libkdepim.so.4
#17 0xb7f263da in KPIM::LdapSearch::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libkdepim.so.4
#18 0xb77eeb33 in QMetaObject::activate (sender=0x93a4978, from_signal_index=5, to_signal_index=5, argv=0xbfb10bdc) at kernel/qobject.cpp:3112
#19 0xb77ef782 in QMetaObject::activate (sender=0x93a4978, m=0xb7fa0238, local_signal_index=1, argv=0xbfb10bdc) at kernel/qobject.cpp:3186
#20 0xb7f1f703 in KPIM::LdapClient::error(QString const&) () from /usr/lib/libkdepim.so.4
#21 0xb7f1feea in KPIM::LdapClient::slotDone() () from /usr/lib/libkdepim.so.4
#22 0xb7f2396b in KPIM::LdapClient::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libkdepim.so.4
#23 0xb77eeb33 in QMetaObject::activate (sender=0x9862de0, from_signal_index=7, to_signal_index=7, argv=0xbfb10d1c) at kernel/qobject.cpp:3112
#24 0xb77ef782 in QMetaObject::activate (sender=0x9862de0, m=0xb7b01b48, local_signal_index=3, argv=0xbfb10d1c) at kernel/qobject.cpp:3186
#25 0xb79a53d3 in KJob::result (this=0x9862de0, _t1=0x9862de0) at ./kjob.moc:188
#26 0xb79a5879 in KJob::emitResult (this=0x9862de0) at ../../kdecore/jobs/kjob.cpp:304
#27 0xb62007b5 in KIO::SimpleJob::slotFinished (this=0x9862de0) at ../../kio/kio/job.cpp:477
#28 0xb6201113 in KIO::TransferJob::slotFinished (this=0x9862de0) at ../../kio/kio/job.cpp:948
#29 0xb61fd273 in KIO::SimpleJob::slotError (this=0x9862de0, err=163, errorText=...) at ../../kio/kio/job.cpp:489
#30 0xb61fd463 in KIO::SimpleJob::qt_metacall (this=0x9862de0, _c=QMetaObject::InvokeMetaMethod, _id=0, _a=0xbfb11008) at ./jobclasses.moc:158
#31 0xb61fd56a in KIO::TransferJob::qt_metacall (this=0x9862de0, _c=QMetaObject::InvokeMetaMethod, _id=31, _a=0xbfb11008) at ./jobclasses.moc:331
#32 0xb77eeb33 in QMetaObject::activate (sender=0x9861fa8, from_signal_index=6, to_signal_index=6, argv=0xbfb11008) at kernel/qobject.cpp:3112
#33 0xb77ef782 in QMetaObject::activate (sender=0x9861fa8, m=0xb63a7b84, local_signal_index=2, argv=0xbfb11008) at kernel/qobject.cpp:3186
#34 0xb62c64c9 in KIO::SlaveInterface::error (this=0x9861fa8, _t1=163, _t2=...) at ./slaveinterface.moc:153
#35 0xb62ca2d7 in KIO::SlaveInterface::dispatch (this=0x9861fa8, _cmd=102, rawdata=...) at ../../kio/kio/slaveinterface.cpp:208
#36 0xb62c6917 in KIO::SlaveInterface::dispatch (this=0x9861fa8) at ../../kio/kio/slaveinterface.cpp:91
#37 0xb62b88fd in KIO::Slave::gotInput (this=0x9861fa8) at ../../kio/kio/slave.cpp:322
#38 0xb62bade3 in KIO::Slave::qt_metacall (this=0x9861fa8, _c=QMetaObject::InvokeMetaMethod, _id=2, _a=0xbfb11298) at ./slave.moc:76
#39 0xb77eeb33 in QMetaObject::activate (sender=0x9a62230, from_signal_index=4, to_signal_index=4, argv=0x0) at kernel/qobject.cpp:3112
#40 0xb77ef782 in QMetaObject::activate (sender=0x9a62230, m=0xb63a44c0, local_signal_index=0, argv=0x0) at kernel/qobject.cpp:3186
#41 0xb61c4937 in KIO::Connection::readyRead (this=0x9a62230) at ./connection.moc:86
#42 0xb61c6243 in KIO::ConnectionPrivate::dequeue (this=0x91edca0) at ../../kio/kio/connection.cpp:82
#43 0xb61c6626 in KIO::Connection::qt_metacall (this=0x9a62230, _c=QMetaObject::InvokeMetaMethod, _id=1, _a=0x917ced8) at ./connection.moc:73
#44 0xb77e833b in QMetaCallEvent::placeMetaCall (this=0x9178488, object=0x9a62230) at kernel/qobject.cpp:477
#45 0xb77e9e10 in QObject::event (this=0x9a62230, e=0x9178488) at kernel/qobject.cpp:1110
#46 0xb6e19814 in QApplicationPrivate::notify_helper (this=0x8ff5c18, receiver=0x9a62230, e=0x9178488) at kernel/qapplication.cpp:4056
#47 0xb6e2197e in QApplication::notify (this=0xbfb11b5c, receiver=0x9a62230, e=0x9178488) at kernel/qapplication.cpp:3603
#48 0xb7cda4ad in KApplication::notify (this=0xbfb11b5c, receiver=0x9a62230, event=0x9178488) at ../../kdeui/kernel/kapplication.cpp:302
#49 0xb77d99cb in QCoreApplication::notifyInternal (this=0xbfb11b5c, receiver=0x9a62230, event=0x9178488) at kernel/qcoreapplication.cpp:610
#50 0xb77da60e in QCoreApplication::sendEvent (receiver=0x0, event_type=0, data=0x8fca998) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:213
#51 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x8fca998) at kernel/qcoreapplication.cpp:1247
#52 0xb77da7ed in QCoreApplication::sendPostedEvents (receiver=0x0, event_type=0) at kernel/qcoreapplication.cpp:1140
#53 0xb7804c0f in QCoreApplication::sendPostedEvents (s=0x8fead10) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:218
#54 postEventSourceDispatch (s=0x8fead10) at kernel/qeventdispatcher_glib.cpp:210
#55 0xb5233e98 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#56 0xb5237623 in ?? () from /lib/libglib-2.0.so.0
#57 0xb52377a8 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#58 0xb7804858 in QEventDispatcherGlib::processEvents (this=0x8fca6e8, flags=...) at kernel/qeventdispatcher_glib.cpp:327
#59 0xb6eb8fd5 in QGuiEventDispatcherGlib::processEvents (this=0x8fca6e8, flags=...) at kernel/qguieventdispatcher_glib.cpp:202
#60 0xb77d801a in QEventLoop::processEvents (this=0xbfb119d0, flags=...) at kernel/qeventloop.cpp:149
#61 0xb77d8462 in QEventLoop::exec (this=0xbfb119d0, flags=...) at kernel/qeventloop.cpp:201
#62 0xb77da8b9 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#63 0xb6e19697 in QApplication::exec () at kernel/qapplication.cpp:3525
#64 0x0804bd40 in _start ()

Reported using DrKonqi