Find an image in a web site that ends in .JPG. Drag it to your desktop and you will get an image called imagename.JPG.jpeg. I think this is incorrect. I think if you need to change the name, it should simply be changed to imagename.jpg. If you find an image with the suffix .jpg, the filename is not changed. <rdar://problem/7065772>
Created attachment 33124 [details] patch
For the record, the text in the description is something from someone who reported the bug, not me.
http://trac.webkit.org/changeset/46227