An extra bit: the reason Josh sees a "*" for his level-icon is because that's the alt-text in the image tag. Firefox displays just the alt text when there's a broken image, whereas safari displays the "no image" icon.
Similarly, it looks to some people like Josh has no avatar, but really he has an avatar that points to a broken link with no alt text, so nothing gets displayed in Firefox (I just checked on that). When I see the site in Firefox, the new-post image still isn't there, but the alt-text (new) is displayed instead.