Version:            (using KDE KDE 3.5.7)
Installed from:    Ubuntu Packages
OS:                Linux

On my Kubuntu 7.04 system Kontact crashes everytime when i close Kontact (File->Quit).

Here's the backtrace of the crash:

System configuration startup check disabled.

Using host libthread_db library "/lib64/libthread_db.so.1".
[Thread debugging using libthread_db enabled]
[New Thread 47100096284224 (LWP 21679)]
[New Thread 1107310912 (LWP 21793)]
[New Thread 1098918208 (LWP 21792)]
[New Thread 1090525504 (LWP 21791)]
[New Thread 1082132800 (LWP 21790)]
[KCrash handler]
#5  0x00002ad65d6117d5 in KMail::ImapAccountBase::cancelMailCheck ()
   from /opt/kde3/lib64/libkmailprivate.so
#6  0x00002ad65d61bfc6 in KMAcctCachedImap::cancelMailCheck ()
   from /opt/kde3/lib64/libkmailprivate.so
#7  0x00002ad65d5bdbd0 in KMail::AccountManager::cancelMailCheck ()
   from /opt/kde3/lib64/libkmailprivate.so
#8  0x00002ad65d0890a2 in KMailPart::~KMailPart ()
   from /opt/kde3/lib64/kde3/libkmailpart.so
#9  0x000000000041ab39 in Kontact::MainWindow::~MainWindow ()
#10 0x0000000000415485 in main ()

I have 6 IMAP accounts configured, but only one of them is doing an automatical mail check.