> They just die from Segmentation faults and dump cores when their rc 
> scripts run. It's not reliable, however, for example sometimes apache 
> won't dump it's core but still won't start.

to debug, run them outside the RC scripts. ktrace/kdump/ktruss httpd -D
,etc.  are you running spamassasin the perl script? or spamc(1)/spamd(8)

from httpd(8)

        -X     Run httpd in debug mode. Only one worker will be  started
                     and the server will not detach from the console.