Bug? Permission denied on reporting anonymous posts Watch
Some times, the "report bad post" feature returns permission denied when you try to submit the reason. I have only seen this with anonymous posts, but I don't know if it affects normal posts as well as it doesn't happen very often. I'm logged in, and I'm pretty sure I'm not banned.
Thus, when the thread reloads after submitting your report, you get the 'You don't have enough permission..." error message.