Sorry, I probably shouldn't have used the term 'standards compliant'.

Don't get me wrong, it's far better than IE, but whereas if you get something working in firefox, it usually works as is in safari/chrome, there's sometimes little quirks in Opera.

As a relatively small userbase use Opera, it'd just be nice if it did things exactly the same as firefox/Chrome - layout, scrolling, iframes, etc etc

I can't remember specific details, but I often notice weird layout quirks, or issues with scrolling (Not well defined in any standard).