Application that crashed: kmail
Version of the application: 1.12.2
KDE Version: 4.3.2 (KDE 4.3.2)
Qt Version: 4.5.2
Operating System: Linux 2.6.28-15-generic x86_64
Distribution: Ubuntu 9.04

What I was doing when the application crashed:
Sure, the IMAP implementation of IBM domino server is a bit clunky, but kmail crashes after raising around 30 error messages.

It seems that there is currently no debug-package available for the kubuntu-launchpad packages - therefore i'm not able 
to send you a complete debug-stacktrace.

This problem apperas after opening the tree beyond the ldap-server node:

The error messages look like this : 
- "Fehler beim Erstellen der Datei Tivoli /TSM: No such file or directory"
- Die Datei „/home/mschoechlin/.kde/share/apps/kmail/imap/.1431899941.directory/.Public Folders.directory/.Info-Verteiler.directory/Tivoli / TSM“ kann nicht geöffnet werden: No such file or directory

All error messages describe folders which contain a slash in the foldername  - it seems that you should think about creating
folder structures in filesystem with a improved algorithm.

 -- Backtrace:
Application: KMail (kmail), signal: Segmentation fault
[Current thread is 0 (LWP 11741)]

Thread 2 (Thread 0x7f938bab5950 (LWP 11744)):
#0  pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:217
#1  0x00007f93a4c47cf7 in QWaitCondition::wait (this=0x264cc28, mutex=0x264cc20, time=30000) at thread/qwaitcondition_unix.cpp:85
#2  0x00007f93a4c3d929 in QThreadPoolThread::run (this=0x15c5060) at concurrent/qthreadpool.cpp:140
#3  0x00007f93a4c46d35 in QThreadPrivate::start (arg=0x15c5060) at thread/qthread_unix.cpp:188
#4  0x00007f939f9f03ba in start_thread (arg=<value optimized out>) at pthread_create.c:297
#5  0x00007f93a41b1fcd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#6  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f93a9e6c750 (LWP 11741)):
[KCrash Handler]
#5  0x00007f93a89bee0c in KMail::FolderView::reloadInternal () from /usr/lib/libkmailprivate.so.4
#6  0x00007f93a89bee55 in KMail::FolderView::reloadInternal () from /usr/lib/libkmailprivate.so.4
#7  0x00007f93a89bee55 in KMail::FolderView::reloadInternal () from /usr/lib/libkmailprivate.so.4
#8  0x00007f93a89bee55 in KMail::FolderView::reloadInternal () from /usr/lib/libkmailprivate.so.4
#9  0x00007f93a89bf123 in KMail::FolderView::reload () from /usr/lib/libkmailprivate.so.4
#10 0x00007f93a89bf4e5 in KMail::FolderView::qt_metacall () from /usr/lib/libkmailprivate.so.4
#11 0x00007f93a89c2626 in ?? () from /usr/lib/libkmailprivate.so.4
#12 0x00007f93a4d45ea2 in QMetaObject::activate (sender=0x154f920, from_signal_index=<value optimized out>, to_signal_index=4, argv=0x0) at kernel/qobject.cpp:3113
#13 0x00007f93a8a60515 in ?? () from /usr/lib/libkmailprivate.so.4
#14 0x00007f93a8ae85de in ?? () from /usr/lib/libkmailprivate.so.4
#15 0x00007f93a8ae927e in ?? () from /usr/lib/libkmailprivate.so.4
#16 0x00007f93a8af1481 in ?? () from /usr/lib/libkmailprivate.so.4
#17 0x00007f93a4d45ea2 in QMetaObject::activate (sender=0x263f700, from_signal_index=<value optimized out>, to_signal_index=12, argv=0x0) at kernel/qobject.cpp:3113
#18 0x00007f93a89cc082 in ?? () from /usr/lib/libkmailprivate.so.4
#19 0x00007f93a89ccfdb in ?? () from /usr/lib/libkmailprivate.so.4
#20 0x00007f93a89ce367 in ?? () from /usr/lib/libkmailprivate.so.4
#21 0x00007f93a4d45ea2 in QMetaObject::activate (sender=0x2524020, from_signal_index=<value optimized out>, to_signal_index=7, argv=0x0) at kernel/qobject.cpp:3113
#22 0x00007f93a930f8f2 in KJob::result (this=0x7f93a4439a00, _t1=0x2524020) at /build/buildd/kde4libs-4.3.2/obj-x86_64-linux-gnu/kdecore/kjob.moc:188
#23 0x00007f93a930fc6f in KJob::emitResult (this=0x2524020) at /build/buildd/kde4libs-4.3.2/kdecore/jobs/kjob.cpp:304
#24 0x00007f93a67215c0 in KIO::SimpleJob::slotFinished (this=0x2524020) at /build/buildd/kde4libs-4.3.2/kio/kio/job.cpp:477
#25 0x00007f93a67216f5 in KIO::ListJob::slotFinished (this=0x2524020) at /build/buildd/kde4libs-4.3.2/kio/kio/job.cpp:2408
#26 0x00007f93a671e84d in KIO::ListJob::qt_metacall (this=0x2524020, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fffb1ebea20)
    at /build/buildd/kde4libs-4.3.2/obj-x86_64-linux-gnu/kio/jobclasses.moc:764
#27 0x00007f93a4d45ea2 in QMetaObject::activate (sender=0x26174f0, from_signal_index=<value optimized out>, to_signal_index=8, argv=0x0) at kernel/qobject.cpp:3113
#28 0x00007f93a67ddbe1 in KIO::SlaveInterface::dispatch (this=0x26174f0, _cmd=104, rawdata=<value optimized out>) at /build/buildd/kde4libs-4.3.2/kio/kio/slaveinterface.cpp:175
#29 0x00007f93a67da732 in KIO::SlaveInterface::dispatch (this=0x26174f0) at /build/buildd/kde4libs-4.3.2/kio/kio/slaveinterface.cpp:91
#30 0x00007f93a67cd2b3 in KIO::Slave::gotInput (this=0x26174f0) at /build/buildd/kde4libs-4.3.2/kio/kio/slave.cpp:322
#31 0x00007f93a67cf518 in KIO::Slave::qt_metacall (this=0x26174f0, _c=QMetaObject::InvokeMetaMethod, _id=6488165, _a=0x7fffb1ebee40)
    at /build/buildd/kde4libs-4.3.2/obj-x86_64-linux-gnu/kio/slave.moc:76
#32 0x00007f93a4d45ea2 in QMetaObject::activate (sender=0x264cdf0, from_signal_index=<value optimized out>, to_signal_index=4, argv=0x0) at kernel/qobject.cpp:3113
#33 0x00007f93a66ea161 in KIO::ConnectionPrivate::dequeue (this=0x25eb270) at /build/buildd/kde4libs-4.3.2/kio/kio/connection.cpp:82
#34 0x00007f93a66ea5ba in KIO::Connection::qt_metacall (this=0x264cdf0, _c=QMetaObject::InvokeMetaMethod, _id=6488165, _a=0x264cb60)
    at /build/buildd/kde4libs-4.3.2/obj-x86_64-linux-gnu/kio/connection.moc:73
#35 0x00007f93a4d405d8 in QObject::event (this=0x264cdf0, e=0x263a0a0) at kernel/qobject.cpp:1111
#36 0x00007f93a5439f4d in QApplicationPrivate::notify_helper (this=0x1375b40, receiver=0x264cdf0, e=0x263a0a0) at kernel/qapplication.cpp:4056
#37 0x00007f93a544218a in QApplication::notify (this=0x7fffb1ebf9d0, receiver=0x264cdf0, e=0x263a0a0) at kernel/qapplication.cpp:4021
#38 0x00007f93a98a7abb in KApplication::notify (this=0x7fffb1ebf9d0, receiver=0x264cdf0, event=0x263a0a0) at /build/buildd/kde4libs-4.3.2/kdeui/kernel/kapplication.cpp:302
#39 0x00007f93a4d306ac in QCoreApplication::notifyInternal (this=0x7fffb1ebf9d0, receiver=0x264cdf0, event=0x263a0a0) at kernel/qcoreapplication.cpp:610
#40 0x00007f93a4d3131a in QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x125aa30) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:213
#41 0x00007f93a4d59e03 in postEventSourceDispatch (s=<value optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:218
#42 0x00007f939bc0e20a in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#43 0x00007f939bc118e0 in ?? () from /usr/lib/libglib-2.0.so.0
#44 0x00007f939bc11a7c in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#45 0x00007f93a4d59a8f in QEventDispatcherGlib::processEvents (this=0x125a660, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:327
#46 0x00007f93a54d2bdf in QGuiEventDispatcherGlib::processEvents (this=0x7f93a4439a00, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:202
#47 0x00007f93a4d2ef42 in QEventLoop::processEvents (this=<value optimized out>, flags={i = -1309935680}) at kernel/qeventloop.cpp:149
#48 0x00007f93a4d2f314 in QEventLoop::exec (this=0x7fffb1ebf800, flags={i = -1309935600}) at kernel/qeventloop.cpp:201
#49 0x00007f93a4d315e4 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#50 0x00000000004030db in _start ()

Reported using DrKonqi