Application that crashed: kmail
Version of the application: 1.11.90
KDE Version: 4.2.86 (KDE 4.2.86 (KDE 4.3 >= 20090514)) "release 125"
Qt Version: 4.5.1
Operating System: Linux 2.6.27.21-0.1-pae i686
Distribution: "openSUSE 11.1 (i586)"

What I was doing when the application crashed:
When starting up kmail, kmail crashes with message

Error opening /home/rod/.kde4/share/apps/kmail/imap/.1717141222.directory/;SECTION=\\SEEN; either this is not a valid maildir folder, or you do not have sufficient access permissions.

E-mail editor can be opened from (e.g.) open office but not the rest of k-mail. 

But, this all worked until 4.2.85 - imap folder was valid, accessible on server. 

 -- Backtrace:
Application: KMail (kmail), signal: Segmentation fault
[Current thread is 1 (Thread 0xb38bca10 (LWP 12660))]

Thread 2 (Thread 0xb03b2b90 (LWP 13089)):
#0  0xffffe430 in __kernel_vsyscall ()
#1  0xb67a0f62 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#2  0xb68006fc in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/libQtCore.so.4
#3  0xb67f5c26 in ?? () from /usr/lib/libQtCore.so.4
#4  0xb67ff70e in ?? () from /usr/lib/libQtCore.so.4
#5  0xb679d1b5 in start_thread () from /lib/libpthread.so.0
#6  0xb5ac63be in clone () from /lib/libc.so.6

Thread 1 (Thread 0xb38bca10 (LWP 12660)):
[KCrash Handler]
#6  KMFolderCachedImap::addMsgInternal (this=0x838b000, msg=0x0, newMail=104, index_return=0xb73818c6) at /usr/src/debug/kdepim-4.2.85/kmail/kmfoldercachedimap.cpp:533
#7  0xb739a57b in KMFolderImap::setSubfolderState (this=0x80ca5e8, state=KMFolderImap::imapNoInformation) at /usr/src/debug/kdepim-4.2.85/kmail/kmfolderimap.cpp:2354
#8  0xb739b22f in KMFolderImap::slotListNamespaces (this=0x80ca5e8) at /usr/src/debug/kdepim-4.2.85/kmail/kmfolderimap.cpp:632
#9  0xb73af7b6 in KMFolderImap::qt_metacall (this=0x80ca5e8, _c=QMetaObject::InvokeMetaMethod, _id=39, _a=0xbf94cdc8) at /usr/src/debug/kdepim-4.2.85/build/kmail/kmfolderimap.moc:194
#10 0xb6909dc8 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQtCore.so.4
#11 0xb690b552 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib/libQtCore.so.4
#12 0xb736f889 in KMail::ImapAccountBase::connectionResult (this=0x80cc0a8, _t1=0, _t2=@0xbf94ce48) at /usr/src/debug/kdepim-4.2.85/build/kmail/imapaccountbase.moc:153
#13 0xb737573b in KMail::ImapAccountBase::slotSchedulerSlaveConnected (this=0x80cc0a8, aSlave=0x86db9a0) at /usr/src/debug/kdepim-4.2.85/kmail/imapaccountbase.cpp:662
#14 0xb737fdfe in KMail::ImapAccountBase::qt_metacall (this=0x80cc0a8, _c=QMetaObject::InvokeMetaMethod, _id=11, _a=0xbf94cf7c) at /usr/src/debug/kdepim-4.2.85/build/kmail/imapaccountbase.moc:129
#15 0xb73879fa in KMAcctImap::qt_metacall (this=0x80cc0a8, _c=QMetaObject::InvokeMetaMethod, _id=21, _a=0xbf94cf7c) at /usr/src/debug/kdepim-4.2.85/build/kmail/kmacctimap.moc:77
#16 0xb6909dc8 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQtCore.so.4
#17 0xb690b552 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib/libQtCore.so.4
#18 0xb6c29993 in KIO::Scheduler::slaveConnected(KIO::Slave*) () from /usr/lib/libkio.so.5
#19 0xb6c2acfd in ?? () from /usr/lib/libkio.so.5
#20 0xb6c304c6 in KIO::Scheduler::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libkio.so.5
#21 0xb6909dc8 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQtCore.so.4
#22 0xb690b552 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib/libQtCore.so.4
#23 0xb6c429c7 in KIO::SlaveInterface::connected() () from /usr/lib/libkio.so.5
#24 0xb6c466e0 in KIO::SlaveInterface::dispatch(int, QByteArray const&) () from /usr/lib/libkio.so.5
#25 0xb6c42e67 in KIO::SlaveInterface::dispatch() () from /usr/lib/libkio.so.5
#26 0xb6c34bdd in KIO::Slave::gotInput() () from /usr/lib/libkio.so.5
#27 0xb6c37073 in KIO::Slave::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libkio.so.5
#28 0xb6909dc8 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQtCore.so.4
#29 0xb690b552 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib/libQtCore.so.4
#30 0xb6b3fcd7 in KIO::Connection::readyRead() () from /usr/lib/libkio.so.5
#31 0xb6b41643 in ?? () from /usr/lib/libkio.so.5
#32 0xb6b41a26 in KIO::Connection::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libkio.so.5
#33 0xb6902a1b in QMetaCallEvent::placeMetaCall(QObject*) () from /usr/lib/libQtCore.so.4
#34 0xb69044b0 in QObject::event(QEvent*) () from /usr/lib/libQtCore.so.4
#35 0xb5d9e69c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#36 0xb5da699e in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#37 0xb7d06b8d in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#38 0xb68f3adb in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#39 0xb68f4725 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () from /usr/lib/libQtCore.so.4
#40 0xb68f491d in QCoreApplication::sendPostedEvents(QObject*, int) () from /usr/lib/libQtCore.so.4
#41 0xb691f90f in ?? () from /usr/lib/libQtCore.so.4
#42 0xb408c9c8 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#43 0xb4090083 in ?? () from /usr/lib/libglib-2.0.so.0
#44 0xb4090241 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#45 0xb691f558 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#46 0xb5e3e975 in ?? () from /usr/lib/libQtGui.so.4
#47 0xb68f20fa in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#48 0xb68f253a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#49 0xb629d6b3 in QDialog::exec() () from /usr/lib/libQtGui.so.4
#50 0xb7c8279c in KMessageBox::createKMessageBox(KDialog*, QIcon const&, QString const&, QStringList const&, QString const&, bool*, QFlags<KMessageBox::Option>, QString const&, QMessageBox::Icon) ()
   from /usr/lib/libkdeui.so.5
#51 0xb7c83ab1 in KMessageBox::createKMessageBox(KDialog*, QMessageBox::Icon, QString const&, QStringList const&, QString const&, bool*, QFlags<KMessageBox::Option>, QString const&) ()
   from /usr/lib/libkdeui.so.5
#52 0xb7c8413a in KMessageBox::sorryWId(unsigned long, QString const&, QString const&, QFlags<KMessageBox::Option>) () from /usr/lib/libkdeui.so.5
#53 0xb7c8427a in KMessageBox::sorry(QWidget*, QString const&, QString const&, QFlags<KMessageBox::Option>) () from /usr/lib/libkdeui.so.5
#54 0xb73d26ff in KMFolderMaildir::canAccess (this=0x838b000) at /usr/src/debug/kdepim-4.2.85/kmail/kmfoldermaildir.cpp:116
#55 0xb73d078b in KMFolderMaildir::open (this=0x838b000) at /usr/src/debug/kdepim-4.2.85/kmail/kmfoldermaildir.cpp:130
#56 0xb72e9ee6 in FolderStorage::countUnread (this=0x838b000) at /usr/src/debug/kdepim-4.2.85/kmail/folderstorage.cpp:872
#57 0xb72b9167 in KMFolder::countUnread (this=0x83839e8) at /usr/src/debug/kdepim-4.2.85/kmail/kmfolder.cpp:496
#58 0xb7268a9b in KMail::FolderViewItem::updateCounts (this=0x83bb628) at /usr/src/debug/kdepim-4.2.85/kmail/folderview.cpp:2942
#59 0xb72690fc in KMail::FolderView::reloadInternal (this=0x8484620, item=0x810cf60) at /usr/src/debug/kdepim-4.2.85/kmail/folderview.cpp:658
#60 0xb72690f4 in KMail::FolderView::reloadInternal (this=0x8484620, item=0x83c9450) at /usr/src/debug/kdepim-4.2.85/kmail/folderview.cpp:656
#61 0xb726945e in KMail::FolderView::reload (this=0x8484620, openFoldersForUpdate=false) at /usr/src/debug/kdepim-4.2.85/kmail/folderview.cpp:744
#62 0xb7269736 in KMail::FolderView::slotColumnVisibilityChanged (this=0x8484620, logicalIndex=1) at /usr/src/debug/kdepim-4.2.85/kmail/folderview.cpp:602
#63 0xb7269941 in KMail::FolderView::qt_metacall (this=0x8484620, _c=QMetaObject::InvokeMetaMethod, _id=14, _a=0xbf94e19c) at /usr/src/debug/kdepim-4.2.85/build/kmail/folderview.moc:210
#64 0xb726cffa in KMail::MainFolderView::qt_metacall (this=0x8484620, _c=QMetaObject::InvokeMetaMethod, _id=141, _a=0xbf94e19c) at /usr/src/debug/kdepim-4.2.85/build/kmail/mainfolderview.moc:64
#65 0xb6909dc8 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQtCore.so.4
#66 0xb690b552 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib/libQtCore.so.4
#67 0xb70690f3 in KPIM::TreeWidget::columnVisibilityChanged (this=0x8484620, _t1=1) at /usr/src/debug/kdepim-4.2.85/build/libkdepim/moc_treewidget.cpp:87
#68 0xb70c9ffd in KPIM::TreeWidget::setColumnHidden (this=0x8484620, logicalIndex=1, hide=<value optimized out>) at /usr/src/debug/kdepim-4.2.85/libkdepim/treewidget.cpp:203
#69 0xb7260f3e in KMail::FolderView::readConfig (this=0x8484620) at /usr/src/debug/kdepim-4.2.85/kmail/folderview.cpp:275
#70 0xb74d2be0 in KMMainWidget::readConfig (this=0x83637f0) at /usr/src/debug/kdepim-4.2.85/kmail/kmmainwidget.cpp:594
#71 0xb74e70e0 in KMMainWidget (this=0x83637f0, parent=0x823d210, aGUIClient=0x823d244, actionCollection=0x82f7d60, config=0x80779c8) at /usr/src/debug/kdepim-4.2.85/kmail/kmmainwidget.cpp:233
#72 0xb71e85cb in KMMainWin (this=0x823d210) at /usr/src/debug/kdepim-4.2.85/kmail/kmmainwin.cpp:41
#73 0xb73f9c91 in KMKernel::openReader (this=0xbf94e778, onlyCheck=false) at /usr/src/debug/kdepim-4.2.85/kmail/kmkernel.cpp:391
#74 0xb73fae94 in KMKernel::action (this=0xbf94e778, mailto=false, check=<value optimized out>, to=@0xbf94e6f8, cc=@0xbf94e6f4, bcc=@0xbf94e6f0, subj=@0xbf94e6ec, body=@0xbf94e6e8, 
    messageFile=@0xbf94e634, attachURLs=@0xbf94e6e0, customHeaders=@0xbf94e6e4) at /usr/src/debug/kdepim-4.2.85/kmail/kmkernel.cpp:1848
#75 0xb73fc23b in KMKernel::handleCommandLine (this=0xbf94e778, noArgsOpensReader=true) at /usr/src/debug/kdepim-4.2.85/kmail/kmkernel.cpp:337
#76 0x0804afed in KMailApplication::newInstance (this=0xbf94e828) at /usr/src/debug/kdepim-4.2.85/kmail/main.cpp:84
#77 0x0804a7fb in main (argc=2, argv=0x3b) at /usr/src/debug/kdepim-4.2.85/kmail/main.cpp:143