MinorFatality: Can you describe what exactly happens? What message do you get? You should be able to create a new thread. Are you trying to include a link or image in your thread? You haven't quite earned that access yet (sorry, we have to set a requirement to keep out spammers). If not, I'm not sure why you can't post.
Shell: How are you trying to post an image, and what happens when you try? You have far more than the required history to do so.