I tried both 6x-1.4 and 6x-1.x-dev. When click on the button, it goes to twitter tweet page. However, the count doesn't work (remain 0). It seems to me that twitter already recorded the tweet - if click the button on the same node again, twitter says it's already been tweeted. But when clicking on tweet count, no searched tweet can be found.
I don't see anything to configure much on the tweetbutton menu. What am I missing here? Please help.