http://trac.webkit.org/changeset/62035 introduced a new method of drawing border-radius using paths. Right now, this new code is only enabled for some platforms…if you want to know if your favorite platform has the new code path enabled, see if it has been added to #define HAVE_PATH_BASED_BORDER_RADIUS_DRAWING in RenderObject.h. We need way more tests for border-radius. We could get some great ones based on the attached interactive test case that Dan made.
Created attachment 59939 [details] Interactive Test Case
Created attachment 60045 [details] New and improved interactive testcase
Created attachment 60046 [details] New and improveder testcase
Created attachment 60145 [details] Twenty tests Here are 20 new tests, many of which are based on interesting snapshots found using the interactive test case.
Thanks Dan! Committed with r62200.