Thread:Project:Support desk/Unknown redirect and page wont save

Hi again i have critical question. When i use &lt;nowiki>&lt;/nowiki> tag on my wiki and trying to save the page it redirects me to the main page and all what had to be saved wasnt do. And it works with some other wikitags (i cant detect them). What it this? Why it redirects me to main page instead of normaly saving page?
 * MediaWiki ver. 1.20.2
 * PHP ver. 5.3.18 (cgi-fcgi)
 * MySQL ver. 5.0.96-community-log