[Plugin: post2pdf] Problems with posts and images

I get the following error when trying to save to PDF on any of my articles that use the NexGen Gallery images:

FPDF error: Missing or incorrect image file: http://www.mywebsite.com/wp-content/gallery/utorrent-feeds/rssfeed.jpg

If I visit the link, the image file comes up, it’s not missing. Really like this mod, but no images, and apparently broken?

http://wordpress.org/extend/plugins/post2pdf/