[Plugin: Hot Linked Image Cacher] Non Direct URL cache issue

For the most part I’m very pleased with this plugin.
But I have noticed it has trouble resolving URLs that don’t link directly to the image file (and hence the URLs have no file type suffix) like all the images on my blog that have been hotlinked from tumblr

Eg, a url like;
http://www.tumblr.com/photo/1280/waxwaves/13290955687/1/tumblr_lv7fv7gg271qerf77
This URL will not be cached by this plugin

Is there any way to account for these types of urls, because there are a large number of links like this in my archive that cannot be cached by this plugin.

Thanks

http://wordpress.org/extend/plugins/hot-linked-image-cacher/