Rounded corners using border-radius are calculated incorrectly. Attached is a project which illustrates the problem and shows a comparison image between QtWebkit and Chrome. This works correctly in both Chrome and Safari.
Created attachment 50035 [details] Test Project and Screenshot comparison
Duplicate of https://bugs.webkit.org/show_bug.cgi?id=31644 *** This bug has been marked as a duplicate of bug 31644 ***