I'm a frequent user of the Twitter sharing plugin, but right now both of them are not working at the moment. It could be something going on at Twitter's side. I already contacted Alberto who made the Sharing Plugin for Twitter. The Twitpic one still gives me incorrect login/pass, even though I'm sure the credentials are correct and tested on the web version. So I don't know if anyone will even update that. I hope these gets fixed/updated soon!

// Roth