Apple does, indeed, pay attention to bug reports, but I'm afraid that yours will most assuredly be ignored, because it deals with a 2 year old Safari 5.x, when the current version is 8.x.
Actually Apples developers are focused on Safari 9 at the moment and are unlikely to offer anything but security patches for Sarari 8. Nothing earth shaking in Safari 9, but it does solve some of the initial page loading slowdowns prevalent in Safari 8 along with relatively minor enhancements to the UI.
