Argh! Tabs disappear

Using the AJAX 1.0 release, I create a page with two tabs on it. The page displays great and a 'refresh' leaves the page untouched. However, if I click the submit button on the page, my two tabs disappear and I get the following javascript error:

Line: 218

Char: 9

Error: 'this.get_element().style' is null or not an object

Code: 0

URL:http://localhost/test/SetPassword.aspx

Any idea what might be causing this?

Thanks.

As I've worked with this, I've found that the error only occurs if the tabs are inside an update panel.

Yes this is a known issue - see this thread for discussion/fix:

http://forums.asp.net/thread/1549317.aspx