MyBB Community Forums

you can use robots.txt file (in the main folder of your web site) to prevent such crawling errors

User-Agent:  *
Disallow: /forums/archive/*
Disallow: /forums/captcha.php
Disallow: /forums/member.php
Disallow: /forums/editpost.php
Disallow: /forums/misc.php
Disallow: /forums/modcp.php
Disallow: /forums/moderation.php
Disallow: /forums/newreply.php
Disallow: /forums/newthread.php
Disallow: /forums/online.php
Disallow: /forums/printthread.php
Disallow: /forums/private.php
Disallow: /forums/ratethread.php
Disallow: /forums/report.php
Disallow: /forums/reputation.php
Disallow: /forums/search.php
Disallow: /forums/sendthread.php
Disallow: /forums/task.php
Disallow: /forums/usercp.php
Disallow: /forums/usercp2.php
Disallow: /forums/calendar.php
Disallow: /forums/*action=emailuser*
Disallow: /forums/*action=nextnewest*
Disallow: /forums/*action=nextoldest*
Disallow: /forums/*year=*
Disallow: /forums/*action=weekview*
Disallow: /forums/*action=nextnewest*
Disallow: /forums/*action=nextoldest*
Disallow: /forums/*sort=*
Disallow: /forums/*order=*
Disallow: /forums/*mode=*
Disallow: /forums/*datecut=*
Allow:  /

pilinko

.m.