http://www.mybroadbandspeed.co.uk/ had problems a bit back which led to them putting a warning on the page:First time I clicked begin it just went blank. Second time worked but the download was way off (37Mb/s instead of 65Mb/s). The upload was a bit low as well but not as bad.Sorry - My Broadband Speed is currently experiencing technical difficulty and may display misleading test results. Thanks for bearing with us while we fix things.That caveat has now been removed so apparently it's fixed (or not!).
Could people give it a go and see how the speeds it reports compare to other testers?