I posted in the Macintosh Forum that I was able to get other .jpg's to load using the attachment feature... perhaps there is a size limit to the # of characters in the file prefix? Here, I'll upload a different one with a shorter name:
whoops! not working right now, I'll come back later
Chris
[attachment=285:cmaresid...st2page2.jpg]
Let's see
Nope, it's not the length of name. Try deleting your cookies.