[Plugin: WP Super Cache] wp super cache problem in Opera, Google Chrome

Hello. I use wp 3.0.5 and wp super cache plugin 0.9.9.9 version. I don’t have any problem with IE and Mozilla Firefox browsers but I can’t post comments with not registred user when I use Opera or Google Chrome. The problem look like:
1. I write user name, email, comment
2. I click button “OK” and I’m automatically redirecting to main page. In url I see: http://www.mypage.com/wp-comments-post.php

How to solve that problem?

http://wordpress.org/extend/plugins/wp-super-cache/