As before, Mac and Windows users each can benefit from a flashy-but-useful 'Top Sites' page that lists thumbnail images of the pages you visit most often (with star icons on pages that have changed since your last visit). The final release of Safari 4 - a free download for Windows XP or Vista and Mac OS X 10.4 or 10.5 - offers the same basic features as the beta release Apple offered this winter. Apple made a lot of news yesterday, but only one of the new products announced yesterday was immediately available for use after its keynote: Safari 4, the latest version of the browser it first shipped on the Mac and then released for Windows a few years ago.