WordPress MU

Hello,
I'm having trouble saving widgets in my mu installation. It's up and running fine but there isn't a button that says "save changes" or anything like that after I add a widget. What happens is I add the widget, then navigate off the page and the widget goes away. Is there supposed to be the "save changes" button like in the regular wordpress?

others with the same problem.
http://mu.wordpress.org/forums/topic/9909?replies=5

You drag the widget over, then wait. There's a small roundabout thingy in the corner that does its business. wait till it stops.

Sometimes I have to open the widget.