I'm upgrading a site from an older version of Headway Themes to a newer one using Theme Test Drive. Everything was going OK until I decided to check on the widgets to see if widgets from the previous version were working in this one. The answer, of course, is "no." It's a new ball game. So I tried to drag a couple of them into the 2 widget areas I have set up so far, and they wouldn't drag. And one of the widget areas wouldn't even open/drop down when I clicked the small arrow. I doubt that I can continue building this site in this way if I can't access any widgets.
I disabled all plugins except for Theme Test Drive, and it didn't make any difference. They are reactivated as of now. I also removed all two CSS rules. Now they're back. No difference.
Here's a video: http://screencast.com/t/kaDae0dUAp6X