Partial output from cgi script

Mathopd/1.5p4
FreeBSD 4.9

Suppose I have a script:

	#!/bin/sh
	printf "Content-type: text/plain\n\n"
	echo "`man -k more`"

If I run it from command line it puts on my machine:

	Content-type: text/plain

	isdnphone(8)             - telephone dialing and more for isdn4bsd
	less(1)                  - opposite of more
	ypmatch(1)               - print the values of one or more keys in a 
	zmore(1)                 - file perusal filter for crt viewing of com
	destroy(n)               - Destroy one or more windows
	foreach(n)               - Iterate over all elements in one or more lists
	lrange(n)                - Return one or more adjacent elements from a list
	replace(1)               - A utility program that is used by msql2mys
	XmAddToPostFromList(3)   - a RowColumn function that makes a menu accessi

But, if such script executes in browser I have (without any errors in
all logs):

	isdnphone(8)             - telephone dialing and more for isdn4bsd
	less(1)                  - opposite of more
	ypmatch(1)               - print the values of one or more keys in a
	zmore(1)                 - file perusal filter for crt viewing of com

Where is the last 5 lines?? Why mathopd cuts cgi output?

-- 
Alex'a X Spirit