Diigolet 4.0b4 does not appear for annotated view of https://secure.coriolis-systems.co... - 3 views
http://www.diigo.com/bookmark/http%3A%2F%2Ftwitter.com%2Fsussexlibrary%2Ffollowing?tab=comment&gname=centrim redirecting away from Diigo reminds me of this bug. Might this issue affecting Twitter...