I'm too late. It's 403 now.
> You don't have permission to access /wp-content/extras/bph-publications/CompLang-1986-04-Hayes-Forth.pdf on this server.
The site shows.
> You don't have permission to access /wp-content/extras/bph-publications/CompLang-1986-04-Hayes-Forth.pdf on this server.
The site shows.
Are there other explanations? Scribd definitely got it automatically at least once, maybe they do it too many times? How many HN users use EC2-based proxies?