Version:           1.9.1 (using KDE 3.5.1-2.3.fc3.kde, Fedora Core release 3 (Heidelberg))
Compiler:          gcc version 3.4.4 20050721 (Red Hat 3.4.4-2)
OS:                Linux (i686) release 2.6.12-1.1381_FC3

IMAP accesss is very much slower than with Thunderbird. Especially the retrieving of the headers is very slow. Sometimes it even crashes with, e.g.:

Using host libthread_db library "/lib/tls/libthread_db.so.1".
`shared object read from target memory' has disappeared; keeping its symbols.
[Thread debugging using libthread_db enabled]
[New Thread -1231571264 (LWP 4060)]
[New Thread -1269695568 (LWP 4112)]
[Thread debugging using libthread_db enabled]
[New Thread -1231571264 (LWP 4060)]
[New Thread -1269695568 (LWP 4112)]
[New Thread -1259205712 (LWP 4111)]
[New Thread -1248715856 (LWP 4110)]
[New Thread -1238226000 (LWP 4109)]
[Thread debugging using libthread_db enabled]
[New Thread -1231571264 (LWP 4060)]
[New Thread -1269695568 (LWP 4112)]
[KCrash handler]
#6  0xb7181cf7 in QMapPrivateBase::removeAndRebalance ()
   from /usr/lib/qt-3.3/lib/libqt-mt.so.3
#7  0x0401b5cf in KMail::ImapAccountBase::removeJob ()
   from /usr/lib/libkmailprivate.so
#8  0x0401ec6e in KMFolderImap::slotListFolderResult ()
   from /usr/lib/libkmailprivate.so
#9  0x040d1939 in KMFolderImap::qt_invoke () from /usr/lib/libkmailprivate.so
#10 0xb6ec385e in QObject::activate_signal ()
   from /usr/lib/qt-3.3/lib/libqt-mt.so.3
#11 0xb798dcd9 in KIO::Job::result () from /usr/lib/libkio.so.4
#12 0xb79b9466 in KIO::Job::emitResult () from /usr/lib/libkio.so.4
#13 0xb79e36da in KIO::SimpleJob::slotFinished () from /usr/lib/libkio.so.4
#14 0xb79e3a68 in KIO::ListJob::slotFinished () from /usr/lib/libkio.so.4
#15 0xb79e5f55 in KIO::ListJob::qt_invoke () from /usr/lib/libkio.so.4
#16 0xb6ec385e in QObject::activate_signal ()
   from /usr/lib/qt-3.3/lib/libqt-mt.so.3
#17 0xb6ec3f34 in QObject::activate_signal ()
   from /usr/lib/qt-3.3/lib/libqt-mt.so.3
#18 0xb798c000 in KIO::SlaveInterface::finished () from /usr/lib/libkio.so.4
#19 0xb79d9682 in KIO::SlaveInterface::dispatch () from /usr/lib/libkio.so.4
#20 0xb79b7019 in KIO::SlaveInterface::dispatch () from /usr/lib/libkio.so.4
#21 0xb79adbac in KIO::Slave::gotInput () from /usr/lib/libkio.so.4
#22 0xb79b53bf in KIO::Slave::qt_invoke () from /usr/lib/libkio.so.4
#23 0xb6ec385e in QObject::activate_signal ()
   from /usr/lib/qt-3.3/lib/libqt-mt.so.3
#24 0xb6ec3df0 in QObject::activate_signal ()
   from /usr/lib/qt-3.3/lib/libqt-mt.so.3
#25 0xb71f8e74 in QSocketNotifier::activated ()
   from /usr/lib/qt-3.3/lib/libqt-mt.so.3
#26 0xb6ede7b5 in QSocketNotifier::event ()
   from /usr/lib/qt-3.3/lib/libqt-mt.so.3
#27 0xb6e645c9 in QApplication::internalNotify ()
   from /usr/lib/qt-3.3/lib/libqt-mt.so.3
#28 0xb6e6475a in QApplication::notify ()
   from /usr/lib/qt-3.3/lib/libqt-mt.so.3
#29 0xb74f1172 in KApplication::notify () from /usr/lib/libkdecore.so.4
#30 0xb6e58ae2 in QEventLoop::activateSocketNotifiers ()
   from /usr/lib/qt-3.3/lib/libqt-mt.so.3
#31 0xb6e1319e in QEventLoop::processEvents ()
   from /usr/lib/qt-3.3/lib/libqt-mt.so.3
#32 0xb6e79c65 in QEventLoop::enterLoop ()
   from /usr/lib/qt-3.3/lib/libqt-mt.so.3
#33 0xb6e79bbe in QEventLoop::exec () from /usr/lib/qt-3.3/lib/libqt-mt.so.3
#34 0xb6e637cb in QApplication::exec () from /usr/lib/qt-3.3/lib/libqt-mt.so.3
#35 0x08061006 in ?? ()
#36 0xbfde6fa0 in ?? ()
#37 0x00000001 in ?? ()
#38 0x00000001 in ?? ()
#39 0x00000000 in ?? ()