Posting Javascript Error

Hi guys,

I’m no newbie to WordPress, but my boss has brought to my attention that his Word Press has slowed down and has become unusable.

The error has popped up since the upgrade to 2.9.2, I have rolled back a version and still no joy. So I disabled all plugins, still no joy so re-upgraded to 2.9.2 and still no joy.

The error occurs on the new post page where we get the following error.

A script on this page may be busy, or it may have stopped responding. You can stop the script now, or you can continue to see if the script will complete.

Script: http://www.seopositive.com/blog/wp-admin/load-scripts.php?c=1&load=jquery,utils,editor,quicktags&ver=3b8c365f7e0c02d4e8f8102e9e0c6958:19

Any help would be greatly appreciated