Version:           KDE Version 4.1.4 (can't select above - Kontact 1.3, KMail 1.10.4) (using KDE 4.1.3)
OS:                Linux
Installed from:    Ubuntu Packages

Opening an IMAP Folder kontact crashes with signal 11.
Backtrace follows:

Anwendung: Kontact (kontact), Signal SIGSEGV
0x00007fbad682f621 in nanosleep () from /lib/libc.so.6
[Current thread is 0 (LWP 13203)]

Thread 2 (Thread 0x40d4f950 (LWP 13211)):
#0  0x00007fbad6866482 in select () from /lib/libc.so.6
#1  0x00007fbad7a8f006 in ?? () from /usr/lib/libQtCore.so.4
#2  0x00007fbad79c6362 in ?? () from /usr/lib/libQtCore.so.4
#3  0x00007fbad0f8e3ea in start_thread () from /lib/libpthread.so.0
#4  0x00007fbad686dc6d in clone () from /lib/libc.so.6
#5  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7fbad91566f0 (LWP 13203)):
[KCrash Handler]
#5  0x00007fbac1e941cc in KMFolderImap::slotListFolderResult (this=0x2a01f80, job=0x33b3200) at /build/buildd/kdepim-4.1.4/kmail/kmfolderimap.cpp:1364
#6  0x00007fbac1e98cf4 in KMFolderImap::qt_metacall (this=0x2a01f80, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fffe11a1fc0)
    at /build/buildd/kdepim-4.1.4/obj-x86_64-linux-gnu/kmail/kmfolderimap.moc:181
#7  0x00007fbad7ac3134 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#8  0x00007fbad7e8cfb2 in KJob::result (this=0x3329510, _t1=0x33b3200) at /build/buildd/kde4libs-4.1.4/obj-x86_64-linux-gnu/kdecore/kjob.moc:186
#9  0x00007fbad7e8d377 in KJob::emitResult (this=0x33b3200) at /build/buildd/kde4libs-4.1.4/kdecore/jobs/kjob.cpp:290
#10 0x00007fbad57cc2b0 in KIO::SimpleJob::slotFinished (this=0x33b3200) at /build/buildd/kde4libs-4.1.4/kio/kio/job.cpp:498
#11 0x00007fbad57cc3e5 in KIO::ListJob::slotFinished (this=0x33b3200) at /build/buildd/kde4libs-4.1.4/kio/kio/job.cpp:2391
#12 0x00007fbad57d2fdd in KIO::ListJob::qt_metacall (this=0x33b3200, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fffe11a2300)
    at /build/buildd/kde4libs-4.1.4/obj-x86_64-linux-gnu/kio/jobclasses.moc:747
#13 0x00007fbad7ac3134 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#14 0x00007fbad58882a1 in KIO::SlaveInterface::dispatch (this=0x2d2fd90, _cmd=104, rawdata=<value optimized out>) at /build/buildd/kde4libs-4.1.4/kio/kio/slaveinterface.cpp:175
#15 0x00007fbad5885102 in KIO::SlaveInterface::dispatch (this=0x2d2fd90) at /build/buildd/kde4libs-4.1.4/kio/kio/slaveinterface.cpp:90
#16 0x00007fbad5876143 in KIO::Slave::gotInput (this=0x2d2fd90) at /build/buildd/kde4libs-4.1.4/kio/kio/slave.cpp:322
#17 0x00007fbad5878868 in KIO::Slave::qt_metacall (this=0x2d2fd90, _c=QMetaObject::InvokeMetaMethod, _id=54591776, _a=0x7fffe11a2720)
    at /build/buildd/kde4libs-4.1.4/obj-x86_64-linux-gnu/kio/slave.moc:75
#18 0x00007fbad7ac3134 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#19 0x00007fbad5799be0 in KIO::ConnectionPrivate::dequeue (this=0x2d3b8c0) at /build/buildd/kde4libs-4.1.4/kio/kio/connection.cpp:82
#20 0x00007fbad5799d1a in KIO::Connection::qt_metacall (this=0x2d30c70, _c=QMetaObject::InvokeMetaMethod, _id=54591776, _a=0x30e49b0)
    at /build/buildd/kde4libs-4.1.4/obj-x86_64-linux-gnu/kio/connection.moc:72
#21 0x00007fbad7abdda5 in QObject::event () from /usr/lib/libQtCore.so.4
#22 0x00007fbad6fd0c3d in QApplicationPrivate::notify_helper () from /usr/lib/libQtGui.so.4
#23 0x00007fbad6fd89ba in QApplication::notify () from /usr/lib/libQtGui.so.4
#24 0x00007fbad840c13b in KApplication::notify (this=0x7fffe11a3180, receiver=0x2d30c70, event=0x3123b70) at /build/buildd/kde4libs-4.1.4/kdeui/kernel/kapplication.cpp:311
#25 0x00007fbad7aaed61 in QCoreApplication::notifyInternal () from /usr/lib/libQtCore.so.4
#26 0x00007fbad7aaf9fa in QCoreApplicationPrivate::sendPostedEvents () from /usr/lib/libQtCore.so.4
#27 0x00007fbad7ad74d3 in ?? () from /usr/lib/libQtCore.so.4
#28 0x00007fbad11dcd3b in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#29 0x00007fbad11e050d in ?? () from /usr/lib/libglib-2.0.so.0
#30 0x00007fbad11e06cb in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#31 0x00007fbad7ad715f in QEventDispatcherGlib::processEvents () from /usr/lib/libQtCore.so.4
#32 0x00007fbad7062a6f in ?? () from /usr/lib/libQtGui.so.4
#33 0x00007fbad7aad682 in QEventLoop::processEvents () from /usr/lib/libQtCore.so.4
#34 0x00007fbad7aad80d in QEventLoop::exec () from /usr/lib/libQtCore.so.4
#35 0x00007fbad7aafcbd in QCoreApplication::exec () from /usr/lib/libQtCore.so.4
#36 0x00000000004048e5 in main (argc=1, argv=0x7fffe11a3868) at /build/buildd/kdepim-4.1.4/kontact/src/main.cpp:218


Reproducable opening the same IMAP Folder - other do work.
The only way to get rid - i can't use kontact anymore to view my mails in this folder, is to remove the folder in ~/.kde/share/apps/kmail/imap/..../THEFOLDER+FILES to get them refetched - after that it does work again.