Hi, it's me again. :)
After updating to version 2.2.2 with support for Open Graph one of the best features are gone: No more usernames anymore!
Thats because Twitter ignores meta attributes "og:creator" and "og:site".
Displaying the usernames is the most important features when someone tweets a link to your site without mentioning you.
Please see an screenshot example here:
It would be great if you could add "twitter:creator" and "twitter:site" again!