IE 8 show mobile.twitter.com/?
Please contact @support with issues with the site or your account at https://support.twitter.com – we can’t assit here.
This help desk article might assist you: https://support.twitter.com/articles/20169327-ie6-and-7-users-see-mobile-twitter-com-instead-of-twitter-com
The intention is that older browsers are now redirected to mobile.twitter.com rather than continuing to support their obsolescence. In some cases with more recent versions of IE, a compatibility mode filter will cause our site to think you’re using an older version.