In the resources box on the right - the link to "Installed Files (via PFL)" is broken. I suspect the script on the upstream website no longer indexes the files per-package and only performs a search the other way (package->files). Perhaps the webmaster can be contacted and find out whether the API has changed, or what is going on, and whether it can be fixed, or the button on the packages.g.o site dropped. I've always liked the integration that the Resources box brings, so it would be nice to resolve this issue!
From what I could understand, the type of search (available versions) p.g.o does to PFL is no longer supported. And old screenshot of their website (http://archive.li/Tui9N) shows an item (available versions) in the left menu that is no longer available in their website. The integration was using that specific search functionality. Perhaps you could contact them and see if they can re-add this functionality?
Created attachment 540046 [details, diff] Remove PFL integration links Until we find a resolution to this problem, shouldn't we remove the PFL links? I have attached a patch that removes the PFL integrations links that are broken.
Since this patch has been merged, should we close this issue? https://gitweb.gentoo.org/sites/packages.git/commit/?id=3b20f801380b2e37f1b06033bc3018987c75174f
