I know that question is damn old. But since that issue with Twitter is still valid, as a follow up on BK's answer, I created a custom tweet button that looks exactly like the one of Twitter's JS API but doesn't use it and still includes the share count! So, for those interested, I uploaded it to my GitHub.
Demo: http://fiddle.jshell.net/eyecatchup/Th6P2/2/show/
Code: https://github.com/eyecatchup/tweetbutton