Draggable error when using cancel option

Draggable error when using cancel option


I'm trying out the UI 1.5b version of ui.draggable.js. I have included
ui.base.js in my page.
I have a div that has been given an id"test".
In my $(document).ready() function, I attach the draggable to that element:
$("#test").draggable();
This works fine. However, as soon as I try to add any options, such as
"cancel" or "helper", I get syntax errors in Firefox/Firebug.
The UI docs page for draggable (
http://docs.jquery.com/UI/Draggables/draggable#options ) states that
ui.draggable.ext.js must be included in order to use options hashes.
However, ui.draggable.ext.js is nowhere to be found in the UI 1.5b
download, either minified, packed, or uncompressed.
Are my problems resulting from this file being missing, and, if so,
where can I get it?
Thanks,
Carl