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by searchmartin 3991 days ago
Here's a write up as to why they have made the changes. Was going to write it yesterday, but life got in the way:

http://webmarketingschool.com/no-twitter-did-not-just-de-ind...

1 comments

Why would you not use 301 redirects or just rel=canonical?
There must be some platform issue is my best guess...
They could at least have allowed the Internet Archive in the robots.txt, since the way things stand all www.twitter.com links will be unavailable from the Wayback Machine. That will obviously be a huge loss to researchers.
(Update: the Wayback Machine will be fine, using the twitter.com/robots.txt)