Has Opera 10 beta dropped support for the background-size CSS rule? [closed]

Has Opera 10 beta dropped support for the background-size CSS rule? [closed]

Opera 9.5, according to this Opera Dev article, and also this MDC article has support for the CSS 3 background-size rule through -o-background-size vendor extension. I've been playing around today with the code from the MDC article and have got it to work in Firefox and Chromium, but it doesn't work in Opera 10 Beta 2: