Update: great news!
Opera can actually scroll a page on
www.telegraph.co.uk with more than ten pages of the site open in tabs!
This is an incredible result as the Telegraph site is one of the world's best known Worst Websites of the World That Actually Think They're Good. Firefox and K-Meleon are terminally paralysed* with four or five Telegraph pages open, so this is a fantastic result!
* Unless maybe you are running a Cray or something