HN automatically adds a [scribd] link when a PDF is posted.

Recently there were few (one for sure) postings with scribd.com listed in parenthesis and they had nothing to do with scribd (they were all pdf's if i remember correctly). This case sure is different - even stranger. Looks like HN script is behaving.

edit: Fresh example from /newest list: http://news.ycombinator.com/item?id=3190866

HN has been adding [scribd] links to pdfs for a very long time. Scribd is a YC startup.

Roger that. (Am kinda new here.)

Then, it looks like its uploading pdf to Scribd or looking for Scribd copy of a posted pdf ...or does something completely different.

http://www.scribd.com/vacuum? sure sounds mystic.

Anyway, not much to discuss.

I assume the script is called "vacuum" because it sucks in a url (and then displays it.)