Im having issues with the Hudson configuration page when using internet explorer
7. It seems that the optional block doesnt work in IE 7, i can see the block
content even if the checkbox isnt checked. The status bar shows a JavaScript
error, which could well be the root of the problem: "Object doesn't support this
property or method."

Other types of hidden blocks works as they should.
The Advanced blocks are not shown until the button is clicked, as in Firefox.
The separate SCM blocks are not shown for those SCMs that arent selected, as in
Firefox.

Ive confirmed that the problem is showing up when using
http://ipinfo.info/netrenderer/index.php which can be used to test the web pages
in IE6 and IE7.