There is a bug in the forum when it comes to posting attachments.
If you try to post and image that is too large, or in my last case I tried to post an image with JPEG extension, and you can only post JPG (or others in list) you get an error, telling you to correct the issue. That is the OK part.
However if you go and change your attachement, then try to repost you get another error.
"An Error Has Occurred!
You already submitted this post! You might have accidently double clicked, or tried to refresh. "
The only way to get out of this, is to go back and start a new topic.
Not a big deal, but a bug none the less.
Thanks,
Andrew