For what it's worth, I just made my first posting with images included, and I had a heck of a time getting them to be visible. Neither of the upload methods worked for me - I got a small logo in place of the image. I finally had to take my images from Flickr (BBCode option), delete the extra tags that Flickr puts around the URL, and paste them between the tags the forum creates for using images from a hosting service.
I'm not sure what changed, but on the old forum I could just copy the BBCode URL from Flickr, paste it into my thread, and the images would show. This doesn't work on the new forum any other way than what I described above.
I hope this doesn't come off as a complaint, just feedback from someone who has some experience posting images on forums. Not an expert, but experienced enough to generally get by.