I've upload images in to the media library (PNGs mostly) for thumbnails of posts. I insert the image from the library at the end of a post, and it shows up fine on the front page, of THAT post. Then, I insert the same picture into another post, at the end, from the library, and it won't show up.
Is this something to do with the theme or WordPress in general?
The theme I'm using is Channel from Theme Junkie.
The website is http://www.amigaz.org