Built-in Twitterwidget not working?

For a site I’m currently working on, it would be nice to use graphene’s built-in twitter widget. I added it to the side bar and supplied the twitterusername (jazzyint), but nothing is happening. There’s just an empty widget in my sidebar now. Does somebody else have this problem or can somebody tell me what I am doing wrong? Thanks in advance.

[EDIT]
After some more digging, it appears to be a firefox related problem, and not graphene related (it works fine in safari). As seen in this topic on the theme author’s forum. Sorry for the post. Apparently this is not yet resolved in FF 5.0.1. The problem is in the fact that the javascript call to the twitterapi is not loaded correctly.