this is a new bug that just started happening since upgrading to 3.0. I upload a thumbnail of an image into the body of the post and a larger version of the image appears at the top of the post. AND THERE'S NO CODE....
Even when I delete the code for the image, while the thumbnail (that I wanted to be there) disappears, the large image at the top is still showing up!
BTW - I'm not a techie, programmer, just a mostly happy wordpress user. My blog url is http://artists-edge.com/blog