On 15 Apr 2008, at 18:55, Richard Burford wrote:
I think it's done with JavaScript: http://acko.net/blog/anti-aliased-nifty-corners
The implementation on drupal.org is done using pure CSS. The idea is that you're using those 4 extra divs as hooks to add the 4 background images. You specify the position of the background images so they sit in each of the 4 corners. There are so many different ways you can do it and there are even sites whose sole purpose is to showcase these different methods.
Yes you are right, I didn't check out the CSS in Firebug, sorry.
I like this technique: http://www.albin.net/examples/roundedcorners/