Border-radius with a background image appears to be broken in webkit (tested in both Chrome and Safari on Mac). Check out how much the background colour bleeds over the corner. Is this a known issue? I came across this randomly on the Winnipeg Free Press mobile site. It looks like the same issue is not affecting the WordPress UI I’m currently typing it. I haven’t had time to try to duplicate the issue yet. What are the combination of factors that cause this bug to appear?