I haven't been having any problems. If you edit your message after the preview then you have to select your image file again otherwise it won't show up.

I have the same problem, and I did choose the files again during editing of the post.

You first might have to post your photo on a site like photobucket and then try to post the photo here. That's what I do and I haven't had a problem.

There's a size limit to photos here...scale your photos with image editing software and try again.