arrr, they must be on crack. Because if I want to use 320 all the time, I would just use 320, not the other way around. I would rather had them not supporting the tag instead of making the tag useless. And seriously no one launch an URL in landscape mode, so, 480 is never used.
this is frustrating, just like this forum, they don't use Windows Phone IE and people like me ended up dealing with all sorts of bugs and they don't fix it either.