Comment Re:If Opera implemented other things right,I'd use (Score 1) 301
After further inspection, it isn't an Opera bug, but that case does appear different, here's why.
Inspecting the elements in Opera vs. Chrome (FF and IE don't have 'built in' stuff), suggests that Opera defaults to a 10px margin-right, while Chrome defaults to a 40px margin-right, on the CSS regarding the blockquote, at least on 7chan/hi/.
Live-editing the CSS to 40px (lovely Opera feature), makes it render identical.
The 'user agent style sheet' is explicitly left up to the browser, and most things say if you -don't- want the margins and padding left up to the browser, you're supposed to reset with margin:0, padding: 0.
For sites where small layout elements are emphasized in such a way...did nobody notice (or report this to the site owners) in the last 6+ years or so?
The specification doesn't mandate that a browser do anything other than accept the tag. It doesn't specify how, when, or why it does or doesn't render it. The site(s) in question should be relying on browser-independent behavior, including -probably- not using blockquotes in such a way, when it's deprecated.