No Preview Image in Favorites

You know when you add a manga/doujinshi to your favorites, and those like preview images (or cover art) of the said manga/doujinshi... Well, I add a couple of a manga/doujinshi to my favorites, and I not getting any preview images instead I am getting the title of those manga/doujinshi. It's not all of my favorites, it appears to the new stuff that has been updated here.

I'm also having this same problem. It's really annoying. It seems to be when you add a new doujin to your favourites. The cover image isn't there.

It just looks like this:

Just tested it, also noticed this, seems to be a fail while generating the link.

Correct link:
http://c.fakku.net/manga/e/[Number2]_Ore_no_Imouto_ga_Konna_ni_Kawaii_Wake_ga_Nai_-_Everybody_Shares_their_Love/thumbs/001.thumb.jpg

Link on Fav. Page
http://www.fakku.net/images/manga/e/[Number2]_Ore_no_Imouto_ga_Konna_ni_Kawaii_Wake_ga_Nai_-_Everybody_Shares_their_Love/thumbs/001.thumb.jpg

Same problem.