Hmm. I don't have any problems.
I tried your link, and also went to google.co.uk, and typed letterbox toys as search term.
Then when I click on the first link returned by Google, with a light coloured background, I get straight to letterbox.co.uk.
Tried with Firefox 3.6.13 on both Linux and Vista. Also IE8 on Vista.
Cheers,
Peter