Skydrive's main page worked fine in Opera last week, I assume an update caused this. I've made many stupid mistakes myself (sometimes very public ones - http://my.opera.com/hallvors/blog/2012/08/04/bumpy-road-to-o... ), so I have no intention of implying malfeasance or spreading FUD about Skydrive. It is however a surprising and amusing error, hopefully soon fixed.