fortunately yes. But I just noticed another thing that is even if I duplicate the default theme folder, open 'image.php' and update it without any alteration, the single image page will still go down. and my IE says there's a 500 - Internal server error....
And if I update the image.php via FTP, I will be able to see the background of the page, and when I view page source I can see that the page has been completely loaded, but in the browser, nothing is displayed expect the background.....any ideas?