"Rename image" option doesn't work in beta7

"Rename image" option which changes file name to MD5 hash is broken.

The cause is the following code starting from line 80:

 if (variable_get('get_image_rename', 0)) {
          $filename = md5($file->filename) .'.'. end(explode('.', $file->filename));
}

$filename should be changed to $file->filename in line 81 to make things work properly:

 if (variable_get('get_image_rename', 0)) {
          $file->filename = md5($file->filename) .'.'. end(explode('.', $file->filename));
}

BTW cool module, have been searching for something like this for a long time, thx a lot to authors! :)