Version:            (using KDE 3.5.10)
Installed from:    Debian testing/unstable Packages

I open an IMAP folder which contains some changes after last open (multiple users had access to that folder) and KMail crash on opening that folder.

[KCrash handler]
#6  0xb72b6aae in QGDict::look_string () from /usr/lib/libqt-mt.so.3
#7  0xb7bc4608 in KMHeaders::writeSortOrder ()
   from /usr/lib/libkmailprivate.so
#8  0xb7bc4c42 in KMHeaders::setFolder () from /usr/lib/libkmailprivate.so
#9  0xb7db9a72 in KMMainWidget::folderSelected ()
   from /usr/lib/libkmailprivate.so
#10 0xb7dce2e8 in KMMainWidget::qt_invoke () from /usr/lib/libkmailprivate.so
#11 0xb6fe412d in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#12 0xb7b990ae in KMFolderTree::folderSelected ()
   from /usr/lib/libkmailprivate.so
#13 0xb7ba0e07 in KMFolderTree::doFolderSelected ()
   from /usr/lib/libkmailprivate.so
#14 0xb7ba2529 in KMFolderTree::contentsMouseReleaseEvent ()
   from /usr/lib/libkmailprivate.so
#15 0xb7101d30 in QScrollView::viewportMouseReleaseEvent ()
   from /usr/lib/libqt-mt.so.3
#16 0xb71007f1 in QScrollView::eventFilter () from /usr/lib/libqt-mt.so.3
#17 0xb70cce26 in QListView::eventFilter () from /usr/lib/libqt-mt.so.3
#18 0xb7b99ad9 in KMFolderTree::eventFilter ()
   from /usr/lib/libkmailprivate.so
#19 0xb6fe4263 in QObject::activate_filters () from /usr/lib/libqt-mt.so.3
#20 0xb6fe42cb in QObject::event () from /usr/lib/libqt-mt.so.3
#21 0xb701e5ec in QWidget::event () from /usr/lib/libqt-mt.so.3
#22 0xb6f7f7c5 in QApplication::internalNotify () from /usr/lib/libqt-mt.so.3
#23 0xb6f809e2 in QApplication::notify () from /usr/lib/libqt-mt.so.3
#24 0xb766ac22 in KApplication::notify () from /usr/lib/libkdecore.so.4
#25 0xb6f19fbe in QApplication::sendSpontaneousEvent ()
   from /usr/lib/libqt-mt.so.3
#26 0xb6f16f21 in QETWidget::translateMouseEvent ()
   from /usr/lib/libqt-mt.so.3
#27 0xb6f16334 in QApplication::x11ProcessEvent () from /usr/lib/libqt-mt.so.3
#28 0xb6f29e2c in QEventLoop::processEvents () from /usr/lib/libqt-mt.so.3
#29 0xb6f981a0 in QEventLoop::enterLoop () from /usr/lib/libqt-mt.so.3
#30 0xb6f98066 in QEventLoop::exec () from /usr/lib/libqt-mt.so.3
#31 0xb6f7fe5f in QApplication::exec () from /usr/lib/libqt-mt.so.3