ok, i dont know if its exactly the same thing, but i noticed something similar on my sites (it may have to do with the way i try to prevent ppl from stealin my images) but when i went to the main page
http://photojen.t35.com - it wouldnt load the images, but if i was to refresh it the images would appear without even loading. so basically i forced it to "refresh" the page by making my index.html file forward to the main page which for me is index.php - it just seemed that if it was only "http://photojen.t35.com" it wouldnt load but if it had the "/file.ext" it would... idk