Version:           1.8 (using KDE 3.3.2,  (3.1))
Compiler:          gcc version 3.3.5 (Debian 1:3.3.5-8)
OS:                Linux (i686) release 2.4.27-20041122

Steps to reproduce:
- delete a thread in a mailbox
- switch to an other mailbox
- press ctrl-z to undo that deletion

environment: online imap, not only in inbox, only happens when deleting a thread, cvs head of approx. last friday with kde 3.3 base. 10% chance this is caused by a bad installation.

Trace:
sing host libthread_db library "/lib/libthread_db.so.1".
[Thread debugging using libthread_db enabled]
[New Thread 16384 (LWP 17643)]
[KCrash handler]
#5  0x00000000 in ?? ()
#6  0x42a6a4b4 in KMFolderImap::addMsgQuiet (this=0x84f7208, msgList=
        {<QGList> = {<> = {<No data fields>}, firstNode = 0x83520b0, lastNode = 0x83520b0, curNode = 0x83520b0, curIndex = 0, numNodes = 1, iterators = 0x0}, <No data fields>}) at /usr/src/kdepim/kmail/kmfolderimap.cpp:321
#7  0x42a733ff in KMFolderImap::qt_invoke (this=0x84f7208, _id=9, 
    _o=0xbfffec30) at kmfolderimap.moc:286
#8  0x416175ac in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#9  0x42b3b178 in KMail::FolderJob::messageCopied (this=0x8ca5738, t0=
        {<QGList> = {<> = {<No data fields>}, firstNode = 0x8819ea8, lastNode = 0x8819ea8, curNode = 0x8819ea8, curIndex = 0, numNodes = 1, iterators = 0x0}, <No data fields>}) at folderjob.moc:169
#10 0x42b4543b in KMail::ImapJob::slotCopyMessageResult (this=0x8ca5738, 
    job=0x8ebcce0) at /usr/src/kdepim/kmail/imapjob.cpp:631
#11 0x42b45a16 in KMail::ImapJob::qt_invoke (this=0x8ca5738, _id=8, 
    _o=0xbfffed90) at imapjob.moc:132
#12 0x416175ac in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#13 0x40bbf14a in KIO::Job::result () from /usr/lib/libkio.so.4
#14 0x40ba845c in KIO::Job::emitResult () from /usr/lib/libkio.so.4
#15 0x40ba995c in KIO::SimpleJob::slotFinished () from /usr/lib/libkio.so.4
#16 0x40bbfbcd in KIO::SimpleJob::qt_invoke () from /usr/lib/libkio.so.4
#17 0x416175ac in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#18 0x416173d4 in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#19 0x40b9e7ee in KIO::SlaveInterface::finished () from /usr/lib/libkio.so.4
#20 0x40b9d369 in KIO::SlaveInterface::dispatch () from /usr/lib/libkio.so.4
#21 0x40b9c889 in KIO::SlaveInterface::dispatch () from /usr/lib/libkio.so.4
#22 0x40b9a2bb in KIO::Slave::gotInput () from /usr/lib/libkio.so.4
#23 0x40b9bfd8 in KIO::Slave::qt_invoke () from /usr/lib/libkio.so.4
#24 0x416175ac in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#25 0x4161770d in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#26 0x41956092 in QSocketNotifier::activated () from /usr/lib/libqt-mt.so.3
#27 0x41633d70 in QSocketNotifier::event () from /usr/lib/libqt-mt.so.3
#28 0x415babff in QApplication::internalNotify () from /usr/lib/libqt-mt.so.3
#29 0x415ba1fe in QApplication::notify () from /usr/lib/libqt-mt.so.3
#30 0x41149e03 in KApplication::notify () from /usr/lib/libkdecore.so.4
#31 0x415aa5fa in QEventLoop::activateSocketNotifiers ()
   from /usr/lib/libqt-mt.so.3
#32 0x41563c23 in QEventLoop::processEvents () from /usr/lib/libqt-mt.so.3
#33 0x415ccf58 in QEventLoop::enterLoop () from /usr/lib/libqt-mt.so.3
#34 0x415cce08 in QEventLoop::exec () from /usr/lib/libqt-mt.so.3
#35 0x415bae51 in QApplication::exec () from /usr/lib/libqt-mt.so.3
#36 0x0805ad99 in main (argc=1, argv=0xbffffbb4)
    at /usr/src/kdepim/kontact/src/main.cpp:156