Kmail & Kontact always crash in 4.5 RC2

[jcphil]

Both of these were working fine before I updated to RC2 from RC1. If I try to start Kmail from the command line, the output looks like this:

rebus@rebus-desktop:~$ kmail
Connecting to deprecated signal QDBusConnectionInterface::serviceOwnerChanged(QStr ing,QString,QString)
kmail(4816) KMFolderMgr::removeFolderAux: Can not find parent folder for Last Search
kmail(4816) KMFolder::updateIndicatorIcon: Could not read image from ""
kmail(4816) KMFolder::updateIndicatorIcon: Could not read image from ""
kmail(4816) KMFolder::updateIndicatorIcon: Could not read image from ""
kmail(4816) KMFolder::updateIndicatorIcon: Could not read image from ""
kmail(4816) KMFolderImap::account: No parent folder found for "1524481668"
<unknown program name>(4815)/: Communication problem with "kmail" , it probably crashed.
Error message was: "org.freedesktop.DBus.Error.NoReply" : " "Message did not receive a reply (timeout by message bus)" "

KCrash: Application 'kmail' crashing...
KCrash: Attempting to start /usr/lib/kde4/libexec/drkonqi from kdeinit
sock_file=/home/rebus/.kde/socket-rebus-desktop/kdeinit4__0

I tried renaming the Mail directory (as one poster suggested) and restarting Kmail. That had no effect. Any ideas out there on the horizon?