Great. It works! Solve my problems because of HTTP Error while uploading image from my PC. But the first time, my image did not appeared well because I have space in my image file name. Although the space is replaced by %20 but still, the image is not appeared well. I have no idea what happened. But I am landing here to report the issue that I have experienced when trying this plugin. Thank you Otto for making this plugin. :-)
http://wordpress.org/extend/plugins/dropbox-photo-sideloader/
