spamd error

[yurka]

Hi,
My spamd some times get error :

Dec 11 21:13:15 server spamd[27514]: spamd: got connection over /tmp/spamd_full.sock
Dec 11 21:13:15 server spamd[27514]: spamd: bad protocol: header error: (closed before headers) at /usr/local/psa/spamassassin/bin/spamd line 1675.
Dec 11 21:13:15 server spamd[737]: spamd: bad protocol: header error: (closed before headers) at /usr/local/psa/spamassassin/bin/spamd line 1675.
Dec 11 21:13:15 server spamd[733]: prefork: child states: II
Dec 11 21:13:15 server spamd[730]: prefork: child states: II

System is: FreeBSD 6.0/PSA8.0.1 with latest update
Is there any way to get more ditails on this error?