dovecot - Feb 2004 - Dovecot died due to some SSL related error

Hi,
Dovecot (pre-compiled version of Fedora Core 1, configured for Maildir)
is running fine for me since a few days. It happened now twice to me
that dovecot died with the following error message in /var/log/maillog:

Feb  4 11:18:27 hundehuette imap-login: RAND_bytes() failed:
error:24064064:random number generator:SSLEAY_RAND_BYTES:PRNG not
seeded
Feb  4 11:18:27 hundehuette dovecot: Login process died too early -
shutting down

As these previous log messages indicate the login was working before
without any problem:
Feb  4 11:02:37 hundehuette imap-login: Login: andrea [192.168.2.138]
Feb  4 11:05:56 hundehuette last message repeated 30 times
Feb  4 11:09:02 hundehuette last message repeated 15 times
Feb  4 11:12:08 hundehuette last message repeated 15 times
Feb  4 11:15:15 hundehuette last message repeated 15 times
Feb  4 11:18:21 hundehuette last message repeated 15 times
Feb  4 11:18:26 hundehuette last message repeated 12 times

Dovecot is running as user "dovecot" who does not have a ~/.rnd file

Any idea?

Thanks,
Christof