[Dovecot] alpha4 - Unknown passdb driver 'pam'

Does anybody see this?

Oct 24 19:41:44 athena dovecot: Dovecot v1.0.alpha4 starting up Oct 24 19:41:45 athena dovecot: Auth process died too early - shutting down Oct 24 19:41:45 athena dovecot: auth(default): Unknown passdb driver 'pam' Oct 24 19:41:45 athena dovecot: child 3374 (auth) returned error 89

This is on Fedora FC5-devel x86_64 (opteron), which is certainly pam based.

FWIW, if I switch to passwd dovecot alph4 runs fine (so far).

Regards, Willem Riede.