I'm using the 2.3.8 version of WP to Twitter.
It's generally working fine; posting to Twitter is OK but there seems to be a problem with bit.ly integration. It keeps giving the following error even though my bit.ly settings are correct.
There's been an error shortening your URL! Visit your WP to Twitter settings page to get more information and to clear this error message.
There was a similar problem before but it seems to be ongoing.