My bad. I tried looking ahead of time to see if this had been posted before on HN and didn't find anything. I think it's because of the post's title, which differed from the article's. I was also under the impression that HN didn't allow repeat submissions, but I guess that feature expires after a certain amount of time. Does anyone know a close to fool-proof way for searching to see if an article has already been posted before?

No problem. I guess "dupe" was a bit harsh. I just remember seeing this on here before and that there were a lot of comments which others might enjoy seeing. You're right, the post permalink has been changed. HN allows repeat submissions after some amount of time, though. I use searchyc.com to search for previous submissions, but it's not completely fool-proof.

Great, thanks for the link. This seems to be a better alternative to a Google search on HN.

You might have tried something like http://siteexplorer.search.yahoo.com/search?p=theinvisibl.co...

But I don't think that works here either.

It looks like they changed the page name from "http://www.theinvisibl.com/news/2009/12/08/a-piece-with-a-lo... as that is the name cached by Google. Perhaps some clever cloaking for SEO purposes ...?

Ordinarily a Google search for "link:http://www.theinvisibl.com/news/2009/12/08/a-piece-with-a-lo... site:ycombinator.com" would do it I think.

410 days ago? I had just noticed this behavior in Chrome myself a few weeks ago, and thought it might be new beta behavior that no one had really talked about. Guess not.