Version:           1.9.3 (using KDE 3.5.3 Level "a" , unofficial build of SUSE )
Compiler:          Target: x86_64-suse-linux
OS:                Linux (x86_64) release 2.6.16.13-4-default

After a while kmail will stop downloading emails from my cyrus imap server.  While clicking on a few emails and trying to force it to download, it crashed with the following crash dump:

System configuration startup check disabled.

Using host libthread_db library "/lib64/libthread_db.so.1".
[Thread debugging using libthread_db enabled]
[New Thread 47740913942032 (LWP 23829)]
[New Thread 1107310912 (LWP 23833)]
[New Thread 1098918208 (LWP 23832)]
[New Thread 1090525504 (LWP 23831)]
[New Thread 1082132800 (LWP 23830)]
[KCrash handler]
#5  0x00002b6b85cd7678 in KMail::ImapJob::slotGetNextMessage ()
   from /opt/kde3/lib64/libkmailprivate.so
#6  0x00002b6b85cd82d5 in KMail::ImapJob::init ()
   from /opt/kde3/lib64/libkmailprivate.so
#7  0x00002b6b85cd956a in KMail::ImapJob::execute ()
   from /opt/kde3/lib64/libkmailprivate.so
#8  0x00002b6b85cb1a6b in KMMainWidget::slotMsgSelected ()
   from /opt/kde3/lib64/libkmailprivate.so
#9  0x00002b6b85cc0c26 in KMMainWidget::qt_invoke ()
   from /opt/kde3/lib64/libkmailprivate.so
#10 0x00002b6b867c8a8c in QObject::activate_signal ()
   from /usr/lib/qt3/lib64/libqt-mt.so.3
#11 0x00002b6b85b388e2 in KMHeaders::selected ()
   from /opt/kde3/lib64/libkmailprivate.so
#12 0x00002b6b85b3c1fd in KMHeaders::highlightMessage ()
   from /opt/kde3/lib64/libkmailprivate.so
#13 0x00002b6b85b4573e in KMHeaders::qt_invoke ()
   from /opt/kde3/lib64/libkmailprivate.so
#14 0x00002b6b867c8a8c in QObject::activate_signal ()
   from /usr/lib/qt3/lib64/libqt-mt.so.3
#15 0x00002b6b86abc5c5 in QListView::currentChanged ()
   from /usr/lib/qt3/lib64/libqt-mt.so.3
#16 0x00002b6b86898efc in QListView::contentsMousePressEventEx ()
   from /usr/lib/qt3/lib64/libqt-mt.so.3
#17 0x00002b6b8920442a in KListView::contentsMousePressEvent ()
   from /opt/kde3/lib64/libkdeui.so.4
#18 0x00002b6b85b3c6c3 in KMHeaders::contentsMousePressEvent ()
   from /opt/kde3/lib64/libkmailprivate.so
#19 0x00002b6b868c68e3 in QScrollView::viewportMousePressEvent ()
   from /usr/lib/qt3/lib64/libqt-mt.so.3
#20 0x00002b6b868c4809 in QScrollView::eventFilter ()
   from /usr/lib/qt3/lib64/libqt-mt.so.3
#21 0x00002b6b8689756e in QListView::eventFilter ()
   from /usr/lib/qt3/lib64/libqt-mt.so.3
#22 0x00002b6b85b3dc75 in KMHeaders::eventFilter ()
   from /opt/kde3/lib64/libkmailprivate.so
#23 0x00002b6b867c8492 in QObject::activate_filters ()
   from /usr/lib/qt3/lib64/libqt-mt.so.3
#24 0x00002b6b867c84e7 in QObject::event ()
   from /usr/lib/qt3/lib64/libqt-mt.so.3
#25 0x00002b6b867fb5c8 in QWidget::event ()
   from /usr/lib/qt3/lib64/libqt-mt.so.3
#26 0x00002b6b86771a95 in QApplication::internalNotify ()
   from /usr/lib/qt3/lib64/libqt-mt.so.3
#27 0x00002b6b867728bb in QApplication::notify ()
   from /usr/lib/qt3/lib64/libqt-mt.so.3
#28 0x00002b6b86160b08 in KApplication::notify ()
   from /opt/kde3/lib64/libkdecore.so.4
#29 0x00002b6b8671a0f4 in QETWidget::translateMouseEvent ()
   from /usr/lib/qt3/lib64/libqt-mt.so.3
#30 0x00002b6b867192d3 in QApplication::x11ProcessEvent ()
   from /usr/lib/qt3/lib64/libqt-mt.so.3
#31 0x00002b6b8672825f in QEventLoop::processEvents ()
   from /usr/lib/qt3/lib64/libqt-mt.so.3
#32 0x00002b6b867867a1 in QEventLoop::enterLoop ()
   from /usr/lib/qt3/lib64/libqt-mt.so.3
#33 0x00002b6b8678664a in QEventLoop::exec ()
   from /usr/lib/qt3/lib64/libqt-mt.so.3
#34 0x000000000040297d in main ()

Note that I have several imap accounts on this server which kmail subscribes to.

The server appears to be functioning properly and works fine with Thunderbird.