KMail crashed in KMHeaders::msgRemoved

While deleting some mails in an IMAP folder, KMail from Ubuntu Gutsy crashed:

Using host libthread_db library "/lib/tls/i686/cmov/libthread_db.so.1".
[Thread debugging using libthread_db enabled]
[New Thread -1251079984 (LWP 23773)]
[New Thread -1284101232 (LWP 23779)]
[New Thread -1275708528 (LWP 23778)]
[New Thread -1267315824 (LWP 23777)]
[New Thread -1258923120 (LWP 23776)]
[KCrash handler]
#6 0xb7be6973 in KMHeaders::msgRemoved (this=0x87aaf10, id=4,
    msgId=@0xbfcd07e4)
    at /build/buildd/kdepim-3.5.7enterprise20070904/./kmail/headeritem.h:126
#7 0xb7befa29 in KMHeaders::qt_invoke (this=0x87aaf10, _id=113,
    _o=0xbfcd0860) at ./kmheaders.moc:309
#8 0xb5f8b893 in QObject::activate_signal (this=0x8588ad0, clist=0x8e732f0,
    o=0xbfcd0860) at kernel/qobject.cpp:2356
#9 0xb7c22a20 in KMFolder::msgRemoved (this=0x8588ad0, t0=4, t1=@0xbfcd08d8)
    at ./kmfolder.moc:261
#10 0xb7c236ad in KMFolder::qt_emit (this=0x8588ad0, _id=9, _o=0xbfcd0950)
    at ./kmfolder.moc:402
#11 0xb5f8b867 in QObject::activate_signal (this=0x8589518, clist=0x858a018,
    o=0xbfcd0950) at kernel/qobject.cpp:2354
#12 0xb7c41700 in FolderStorage::msgRemoved (this=0x8589518, t0=4,
    t1=@0xbfcd09c8) at ./folderstorage.moc:322
#13 0xb7c43393 in FolderStorage::take (this=0x8589518, idx=4)
    at /build/buildd/kdepim-3.5.7enterprise20070904/./kmail/folderstorage.cpp:454
#14 0xb7cdac20 in KMFolderImap::take (this=0x8589518, idx=4)
    at /build/buildd/kdepim-3.5.7enterprise20070904/./kmail/kmfolderimap.cpp:599
#15 0xb7c4023e in FolderStorage::take (this=0x8589518, msgList=@0xbfcd0a2c)
    at /build/buildd/kdepim-3.5.7enterprise20070904/./kmail/folderstorage.cpp:468
#16 0xb7cda513 in KMFolderImap::take (this=0x8589518, msgList=@0xbfcd0a6c)
    at /build/buildd/kdepim-3.5.7enterprise20070904/./kmail/kmfolderimap.cpp:607
#17 0xb7c22e19 in KMFolder::take (this=0x8588ad0, msgList=@0xbfcd0ae4)
    at /build/buildd/kdepim-3.5.7enterprise20070904/./kmail/kmfolder.cpp:378
#18 0xb7cd88e1 in KMFolderImap::addMsgQuiet (this=0x85995d8,
    msgList=@0xbfcd0b58)
    at /build/buildd/kdepim-3.5.7enterprise20070904/./kmail/kmfolderimap.cpp:379
#19 0xb7cdc423 in KMFolderImap::qt_invoke (this=0x85995d8, _id=10,
    _o=0xbfcd0c14) at ./kmfolderimap.moc:323
#20 0xb5f8b893 in QObject::activate_signal (this=0x95ce1a0, clist=0x95ce220,
    o=0xbfcd0c14) at kernel/qobject.cpp:2356
#21 0xb7dbe151 in KMail::FolderJob::messageCopied (this=0x95ce1a0,
    t0=@0xbfcd0c6c) at ./folderjob.moc:169
#22 0xb7dc7441 in KMail::ImapJob::slotCopyMessageResult (this=0x95ce1a0,
    job=0x8f52b80)
    at /build/buildd/kdepim-3.5.7enterprise20070904/./kmail/imapjob.cpp:659
#23 0xb7dc9c17 in KMail::ImapJob::qt_invoke (this=0x95ce1a0, _id=8,
    _o=0xbfcd0d44) at ./imapjob.moc:132
#24 0xb5f8b893 in QObject::activate_signal (this=0x8f52b80, clist=0x85972e0,
    o=0xbfcd0d44) at kernel/qobject.cpp:2356
#25 0xb6bb7c11 in KIO::Job::result (this=0x8f52b80, t0=0x8f52b80)
    at ./jobclasses.moc:162
#26 0xb6bfeb2d in KIO::Job::emitResult (this=0x8f52b80)
    at /build/buildd/kdelibs-3.5.7/./kio/kio/job.cpp:235
#27 0xb6c0a69e in KIO::SimpleJob::slotFinished (this=0x8f52b80)
    at /build/buildd/kdelibs-3.5.7/./kio/kio/job.cpp:601
#28 0xb6bfe6c1 in KIO::SimpleJob::qt_invoke (this=0x8f52b80, _id=7,
    _o=0xbfcd0f4c) at ./jobclasses.moc:417
#29 0xb5f8b893 in QObject::activate_signal (this=0x8a2bf00, clist=0x8e39e88,
    o=0xbfcd0f4c) at kernel/qobject.cpp:2356
#30 0xb5f8c338 in QObject::activate_signal (this=0x8a2bf00, signal=6)
    at kernel/qobject.cpp:2325
#31 0xb6bafb5c in KIO::SlaveInterface::finished (this=0x8a2bf00)
    at ./slaveinterface.moc:226
#32 0xb6c180d0 in KIO::SlaveInterface::dispatch (this=0x8a2bf00, _cmd=104,
    rawdata=@0xbfcd1160)
    at /build/buildd/kdelibs-3.5.7/./kio/kio/slaveinterface.cpp:243
#33 0xb6c09cda in KIO::SlaveInterface::dispatch (this=0x8a2bf00)
    at /build/buildd/kdelibs-3.5.7/./kio/kio/slaveinterface.cpp:173
#34 0xb6bc573c in KIO::Slave::gotInput (this=0x8a2bf00)
    at /build/buildd/kdelibs-3.5.7/./kio/kio/slave.cpp:300
#35 0xb6c01dd0 in KIO::Slave::qt_invoke (this=0x8a2bf00, _id=4, _o=0xbfcd1288)
    at ./slave.moc:113
#36 0xb5f8b893 in QObject::activate_signal (this=0x8a2ff80, clist=0x8a33818,
    o=0xbfcd1288) at kernel/qobject.cpp:2356
#37 0xb5f8c1aa in QObject::activate_signal (this=0x8a2ff80, signal=2,
    param=25) at kernel/qobject.cpp:2449
#38 0xb631867f in QSocketNotifier::activated (this=0x8a2ff80, t0=25)
    at .moc/debug-shared-mt/moc_qsocketnotifier.cpp:85
#39 0xb5fae46e in QSocketNotifier::event (this=0x8a2ff80, e=0xbfcd15b8)
    at kernel/qsocketnotifier.cpp:258
#40 0xb5f22af0 in QApplication::internalNotify (this=0xbfcd1934,
    receiver=0x8a2ff80, e=0xbfcd15b8) at kernel/qapplication.cpp:2635
#41 0xb5f2491f in QApplication::notify (this=0xbfcd1934, receiver=0x8a2ff80,
    e=0xbfcd15b8) at kernel/qapplication.cpp:2358
#42 0xb66e9242 in KApplication::notify (this=0xbfcd1934, receiver=0x8a2ff80,
    event=0xbfcd15b8)
    at /build/buildd/kdelibs-3.5.7/./kdecore/kapplication.cpp:550
#43 0xb5eb5209 in QApplication::sendEvent (receiver=0x8a2ff80,
    event=0xbfcd15b8) at ../include/qapplication.h:520
#44 0xb5f14ee9 in QEventLoop::activateSocketNotifiers (this=0x808d620)
    at kernel/qeventloop_unix.cpp:578
#45 0xb5ec9d2b in QEventLoop::processEvents (this=0x808d620, flags=4)
    at kernel/qeventloop_x11.cpp:383
#46 0xb5f3d1ce in QEventLoop::enterLoop (this=0x808d620)
    at kernel/qeventloop.cpp:198
#47 0xb5f3cfde in QEventLoop::exec (this=0x808d620)
    at kernel/qeventloop.cpp:145
#48 0xb5f24699 in QApplication::exec (this=0xbfcd1934)
    at kernel/qapplication.cpp:2758
#49 0x0804a5fe in main (argc=)
    at /build/buildd/kdepim-3.5.7enterprise20070904/./kmail/main.cpp:110
#50 0xb5728050 in __libc_start_main () from /lib/tls/i686/cmov/libc.so.6
#51 0x0804a381 in _start ()