Version:           1.9 (using KDE 3.5.0 Level "a" , SUSE 9.3 UNSUPPORTED)
Compiler:          gcc version 3.3.5 20050117 (prerelease) (SUSE Linux)
OS:                Linux (i686) release 2.6.11.4-21.9-smp

My machine runs 24/7 with Kontact always open. I've seen at least one crash per day since upgrading to 3.5.0. First times I ignored it, but here is the backtrace from the current crash.

It has 3 IMAP Folders open and one local mbox to check (which gets about one mail per week). This time the active folder was one of the IMAP inboxes and a new mail arrived. gpg-agent is running in background, but this mail was neither signed nor encrypted. The mail had nothing special, just 5 lines of plain text, no attachments.

Using host libthread_db library "/lib/tls/libthread_db.so.1".
(no debugging symbols found)
[...]
(no debugging symbols found)
[Thread debugging using libthread_db enabled]
[New Thread 1105960864 (LWP 4987)]
(no debugging symbols found)
[...]
(no debugging symbols found)
[KCrash handler]
#7  0x4263d432 in KMFolder::createJob () from /opt/kde3/lib/libkmailprivate.so
#8  0x42838bc8 in KMMainWidget::slotMsgSelected ()
   from /opt/kde3/lib/libkmailprivate.so
#9  0x4291a687 in KMMainWidget::qt_invoke ()
   from /opt/kde3/lib/libkmailprivate.so
#10 0x411119ae in QObject::activate_signal ()
   from /usr/lib/qt3/lib/libqt-mt.so.3
#11 0x42738442 in KMHeaders::selected () from /opt/kde3/lib/libkmailprivate.so
#12 0x428721e1 in KMHeaders::highlightMessage ()
   from /opt/kde3/lib/libkmailprivate.so
#13 0x428753e2 in KMHeaders::finalizeMove ()
   from /opt/kde3/lib/libkmailprivate.so
#14 0x4287ab5b in KMHeaders::msgRemoved ()
   from /opt/kde3/lib/libkmailprivate.so
#15 0x4287c423 in KMHeaders::qt_invoke () from /opt/kde3/lib/libkmailprivate.so
#16 0x411119ae in QObject::activate_signal ()
   from /usr/lib/qt3/lib/libqt-mt.so.3
#17 0x426df2d7 in KMFolder::msgRemoved () from /opt/kde3/lib/libkmailprivate.so
#18 0x42723b1e in KMFolder::qt_emit () from /opt/kde3/lib/libkmailprivate.so
#19 0x411119e1 in QObject::activate_signal ()
   from /usr/lib/qt3/lib/libqt-mt.so.3
#20 0x426df0f7 in FolderStorage::msgRemoved ()
   from /opt/kde3/lib/libkmailprivate.so
#21 0x42842ba3 in FolderStorage::removeMsg ()
   from /opt/kde3/lib/libkmailprivate.so
#22 0x42842ee6 in KMFolderImap::removeMsg ()
   from /opt/kde3/lib/libkmailprivate.so
#23 0x428f6f58 in KMail::ImapJob::slotGetMessageResult ()
   from /opt/kde3/lib/libkmailprivate.so
#24 0x42905717 in KMail::ImapJob::qt_invoke ()
   from /opt/kde3/lib/libkmailprivate.so
#25 0x411119ae in QObject::activate_signal ()
   from /usr/lib/qt3/lib/libqt-mt.so.3
#26 0x406ffca2 in KIO::Job::result () from /opt/kde3/lib/libkio.so.4
#27 0x4075fc4c in KIO::Job::emitResult () from /opt/kde3/lib/libkio.so.4
#28 0x4076740c in KIO::SimpleJob::slotFinished ()
   from /opt/kde3/lib/libkio.so.4
#29 0x40767bba in KIO::TransferJob::slotFinished ()
   from /opt/kde3/lib/libkio.so.4
#30 0x40753d77 in KIO::TransferJob::qt_invoke () from /opt/kde3/lib/libkio.so.4
#31 0x411119ae in QObject::activate_signal ()
   from /usr/lib/qt3/lib/libqt-mt.so.3
#32 0x41112156 in QObject::activate_signal ()
   from /usr/lib/qt3/lib/libqt-mt.so.3
#33 0x4070546c in KIO::SlaveInterface::finished ()
   from /opt/kde3/lib/libkio.so.4
#34 0x40739fc8 in KIO::SlaveInterface::dispatch ()
   from /opt/kde3/lib/libkio.so.4
#35 0x40714c33 in KIO::SlaveInterface::dispatch ()
   from /opt/kde3/lib/libkio.so.4
#36 0x40715fdb in KIO::Slave::gotInput () from /opt/kde3/lib/libkio.so.4
#37 0x4073d42a in KIO::Slave::qt_invoke () from /opt/kde3/lib/libkio.so.4
#38 0x411119ae in QObject::activate_signal ()
   from /usr/lib/qt3/lib/libqt-mt.so.3
#39 0x41111fdd in QObject::activate_signal ()
   from /usr/lib/qt3/lib/libqt-mt.so.3
#40 0x41465c00 in QSocketNotifier::activated ()
   from /usr/lib/qt3/lib/libqt-mt.so.3
#41 0x41131420 in QSocketNotifier::event () from /usr/lib/qt3/lib/libqt-mt.so.3
#42 0x410aec6f in QApplication::internalNotify ()
   from /usr/lib/qt3/lib/libqt-mt.so.3
#43 0x410b0833 in QApplication::notify () from /usr/lib/qt3/lib/libqt-mt.so.3
#44 0x40dbeba1 in KApplication::notify () from /opt/kde3/lib/libkdecore.so.4
#45 0x410a2e16 in QEventLoop::activateSocketNotifiers ()
   from /usr/lib/qt3/lib/libqt-mt.so.3
#46 0x4105c082 in QEventLoop::processEvents ()
   from /usr/lib/qt3/lib/libqt-mt.so.3
#47 0x410c6c01 in QEventLoop::enterLoop () from /usr/lib/qt3/lib/libqt-mt.so.3
#48 0x410c6a46 in QEventLoop::exec () from /usr/lib/qt3/lib/libqt-mt.so.3
#49 0x410b06ff in QApplication::exec () from /usr/lib/qt3/lib/libqt-mt.so.3
#50 0x08064a85 in ?? ()
#51 0xbfffeef0 in ?? ()
#52 0x00000001 in ?? ()
#53 0x00000001 in ?? ()
#54 0x00000000 in ?? ()
#55 0x00000000 in ?? ()
#56 0x00000001 in ?? ()
#57 0x0806a4a0 in typeinfo name for QPtrList<KParts::Part> ()
#58 0x00000000 in ?? ()
#59 0x0806966a in typeinfo name for QPtrList<KParts::Part> ()
#60 0x08069a89 in typeinfo name for QPtrList<KParts::Part> ()
#61 0x40fae57a in ?? () from /usr/lib/qt3/lib/libqt-mt.so.3
#62 0x416baa31 in _int_malloc () from /lib/tls/libc.so.6
#63 0x4166ce80 in __libc_start_main () from /lib/tls/libc.so.6
#64 0x08059371 in ?? ()