Version:            (using KDE 4.2.2)
OS:                Linux
Installed from:    Ubuntu Packages

I changed my IMAP password on the remote host. Now, when I start Kontact or KMail, it crashes because the password in KWallet is incorrect.

Command line output:

rik@rkpc:~$ kmail
kmail(19461) Sonnet::Loader::loadPlugin: Successfully loaded plugin: "kspell_enchant.desktop"
kmail(19461) Sonnet::Loader::loadPlugin: Successfully loaded plugin: "kspell_hspell.desktop"
kmail(19461)/kmail (storage internals) KMFolderIndex::openInternal: KDE_fopen(indexLocation()= "/home/rik/.kde/share/apps/kmail/mail/.outbox.index" , "r+") == mIndexStream ==  0x8e2b768
kmail(19461)/kmail (storage internals) KMFolderIndex::openInternal: KDE_fopen(indexLocation()= "/home/rik/.kde/share/apps/kmail/mail/.drafts.index" , "r+") == mIndexStream ==  0x9215f88
kmail(19461)/kmail (storage internals) KMFolderIndex::openInternal: KDE_fopen(indexLocation()= "/home/rik/.kde/share/apps/kmail/mail/.templates.index" , "r+") == mIndexStream ==  0x92194c8
kmail(19461) KWallet::Wallet::openWallet: Pass a valid window to KWallet::Wallet::openWallet().
rik@rkpc:~$ kmail(19461)/kmail (storage internals) KMFolderIndex::openInternal: KDE_fopen(indexLocation()= "/home/rik/.kde/share/apps/kmail/mail/.inbox.index" , "r+") == mIndexStream ==  0x9aa0740
kmail(19461)/kmail (storage internals) KMFolderMaildir::reallyDoClose: fclose(mIndexStream =  0x9aa0740 )
kmail(19461)/kmail (storage internals) KMFolderIndex::openInternal: KDE_fopen(indexLocation()= "/home/rik/.kde/share/apps/kmail/imap/.372518085.directory/.INBOX.index" , "r+") == mIndexStream ==  0x9be9fb8
kmail(19461)/kmail (storage internals) KMFolderIndex::openInternal: KDE_fopen(indexLocation()= "/home/rik/.kde/share/apps/kmail/mail/.inbox.index" , "r+") == mIndexStream ==  0x9c64d10
kmail(19461)/kmail (storage internals) KMFolderMaildir::reallyDoClose: fclose(mIndexStream =  0x9c64d10 )
ASSERT: "!mSlave" in file /build/buildd/kdepim-4.2.2/kmail/imapaccountbase.cpp, line 304
*** KMail got signal 6 (Crashing)
KCrash: Application 'kmail' crashing...
sock_file=/home/rik/.kde/socket-rkpc/kdeinit4__0

Workaround: I updated the password directly in KWallet, so I can use KMail again.