I was having problems in deleting post that are posted other user. I'll get the "you do not have permission" error when trying to delete the post on Firefox, Safari. While on IE 6 , IE 7 I can delete the post but when I refresh the post comes back.
After a couple of hours trying to figure out what's wrong I finally found the culprit . It was the WordPress Integration Plugin (0.7). Just a little heads up for you guys if you having problems to delete post on your forum.
Andy