Failed to set accept-filter 'httpready': Invalid argument

[sysadm]

# uname -sr
FreeBSD 7.2-RELEASE-p8

# grep 'ACCEPT_FILTER' /usr/src/sys/i386/conf/OUR_KERNEL
options ACCEPT_FILTER_DATA
options ACCEPT_FILTER_HTTP
#

# strings /boot/kernel/kernel |grep accf
sysctl__net_inet_accf_children
sysctl__net_inet_accf_http_children
accf
accf_data
accf_http

2010-10-26 23:19:25.442 [NOTICE] Failed to set accept-filter 'httpready': Invalid argument
2010-10-26 23:19:25.442 [NOTICE] Failed to set accept-filter 'httpready': Invalid argument
2010-10-26 23:19:25.442 [NOTICE] Failed to set accept-filter 'httpready': Invalid argument
2010-10-26 23:19:25.442 [NOTICE] Failed to set accept-filter 'httpready': Invalid argument
(...)

Is Litespeed trying to load accf_http.ko module?
We have this statically compiled in.
Because of this - module is unavailable, but features are fully supported. These errors shouldn't occured.