Make sure the scriptaculous directory (that comes with Sidebar Widgets) is in wp-includes/js/scriptaculous?
Thanks Yosemite – I had EXACTLY the same problem and this fixed it!
I have the same issue as the original poster – can’t get the widgets to move in presentation -> sidebar widdgets. For fun I turned them all “on” by dragging them to the sidebar.
I assume to turn them off you drag and drop to Available Widgets window? There is no other “on/off” toggle.
I do have the scriptaculous libraries in both locations plugins and includes.
I realized I don’t have the exact same issue. My issue is in the admin section, where I can drag/drop to reorder the widgets but just not remove any.
Ok…I didn’t do anything but keep trying and I found one thing that worked. The far LEFT SIDE of the Available Widgets window apparently is “active” when the window is empty. I was dragging the widget around and finally hit that “magic spot”. It worked.