It's still possible that resources crash while shutting down the akonadi server (especially if shutdown is executed immediately after start). It doesn't seem to break anything though...

~|⇒ ProcessControl: Application /opt/devel/kolab/bin/akonadi_agent_launcher stopped unexpectedly ( "Process crashed" )
Application '/opt/devel/kolab/bin/akonadi_agent_launcher' crashed. No restart!
void Akonadi::Server::NotificationSource::serviceUnregistered(const QString&) Notification source "AkonadiAgentServer_23696_LOY1ne" now serving: ()
ProcessControl: Application /opt/devel/kolab/bin/akonadi_agent_launcher stopped unexpectedly ( "Process crashed" )
Application '/opt/devel/kolab/bin/akonadi_agent_launcher' crashed. No restart!
void Akonadi::Server::NotificationSource::serviceUnregistered(const QString&) Notification source "AkonadiAgentServer_23697_6rO2EC" now serving: ()
ProcessControl: Application /opt/devel/kolab/bin/akonadi_imap_resource stopped unexpectedly ( "Process crashed" )
Application '/opt/devel/kolab/bin/akonadi_imap_resource' crashed. No restart!
void Akonadi::Server::NotificationSource::serviceUnregistered(const QString&) Notification source "akonadi_imap_resource_1_23687_oFW1MN" now serving: ()
ProcessControl: Application /opt/devel/kolab/bin/akonadi_agent_launcher stopped unexpectedly ( "Process crashed" )
Application '/opt/devel/kolab/bin/akonadi_agent_launcher' crashed. No restart!
void Akonadi::Server::NotificationSource::serviceUnregistered(const QString&) Notification source "AkonadiAgentServer_23698_zbC5aL" now serving: ()

~|⇒ ProcessControl: Application /opt/devel/kolab/bin/akonadi_imap_resource stopped unexpectedly ( "Process crashed" )
Application '/opt/devel/kolab/bin/akonadi_imap_resource' crashed. No restart!
void Akonadi::Server::NotificationSource::serviceUnregistered(const QString&) Notification source "akonadi_imap_resource_3_23691_CE063j" now serving: ()
ProcessControl: Application /opt/devel/kolab/bin/akonadi_imap_resource stopped unexpectedly ( "Process crashed" )
Application '/opt/devel/kolab/bin/akonadi_imap_resource' crashed. No restart!
void Akonadi::Server::NotificationSource::serviceUnregistered(const QString&) Notification source "akonadi_imap_resource_4_23694_0FojDm" now serving: ()
ProcessControl: Application /opt/devel/kolab/bin/akonadi_mailfilter_agent stopped unexpectedly ( "Process crashed" )
Application '/opt/devel/kolab/bin/akonadi_mailfilter_agent' crashed. No restart!
void Akonadi::Server::NotificationSource::serviceUnregistered(const QString&) Notification source "akonadi_mailfilter_agent_23712_DOjWbc" now serving: ()
ProcessControl: Application /opt/devel/kolab/bin/akonadi_imap_resource stopped unexpectedly ( "Process crashed" )
Application '/opt/devel/kolab/bin/akonadi_imap_resource' crashed. No restart!
void Akonadi::Server::NotificationSource::serviceUnregistered(const QString&) Notification source "akonadi_imap_resource_5_23695_PCbCUQ" now serving: ()