AJAX UpdatePanel & ScriptManager in a UserControl Causes PostBack

[gregfocker]

I'm playing w/this sample:

http://ajax.asp.net/docs/tutorials/CreateSimpleAJAXApplication.aspx

and am trying to get this to work in a UserControl. Clicking to select
a different page of data causes the page to PostBack. Is there a way
to prevent this and just have the async postback occur in the
UserControl without the postback.

fyi - Doing this directly on the page (instead of a UserControl) per
the above sample won't work because of this issue (difficult to change
the established app. to fix it):

http://dotnetdebug.blogspot.com/2006/12/syswebformspagerequestmanagerparsererro.html

Thanks for any help.