[Plugin: comments] Comments loading another post

Hello
After upgrading the system 2.7 to 3.3.2 (running all the steps in Codex), our website just stopped working comments …
Well .. in fact, they work. Going for approval, but instead of staying in the same post (eg, post_id = 10), you click on submit comments, and it loads the next page (example post_id = 11, and if there is to this page, it loads the next database). If you return to the previous page … the comment is there!!
Please, how can I fix it?
Thanks

http://wordpress.org/extend/plugins/comments/