Future proof CSS hack for LTE Opera 10

Question

I’m currently using

@media screen and (-webkit-min-device-pixel-ratio:0) {
    example {}
    html:first-child example {}
}

to target Safari + Opera 9.2

Is there a safe way to target opera gte op 9.5 or lte op 10?
(for example it won't be picked up by an upcoming version of firefox)

By the way, type="text/opera" isn't working anymore

PS: I don't want JavaScript solutions.

Answer 1

* targets Opera 9 & below (and perhaps future versions) - valid HTML & invalid XHTML */

#dis[disabled="true"]+p {}

Source: http://perishablepress.com/press/2006/08/27/css-hack-dumpster/

Answer 2

That was hard but here it is. Works only in Opera gte 9.5 and lt 10.50:

@media all and (resolution = 0dpi) { // exclude Opera 10.50 and higher
  :root #box { // you need to append :root to all selectors to exclude Opera lt 9.5
    background: #f00;
  }
}