What's missing is a Standard LINKS bar.
What is missing from Safari is standard navigation links. Mozilla, Opera, and iCab have all implemented standard navigation bars beautifully. The only major browser that haven't are MSIE and Safari (and, well, sadly, Chimera, if you consider that a major browser).
Standard links navigation takes information from LINK elements in the HEAD element of the HTML document. <link rel="Home" href="index.html /> is an example of the code in XHTML. The browser that supports standard links will enable an icon or word in the standard navigation bar, and clicking this word or icon will bring your site visitor back to your home page from any page in your site that contains that code (where "index.html" is the proper relative link to your home page; in some cases, it would be "../index.html" and so on, but you get my point).
Now, I know Safari has its nice little SnapBack widget, but there are numerous standard links other than "Home." They include: first, previous, next, last, glossary, help, copyright, author, table of contents, chapter, section, subsection, appendix, index, search, bookmarks, and other versions. You are even free to make up your own, though the browsers may only create icon/word buttons for the standard ones and create a drop-down list for author's particular creations.
Navigation bars in browsers take up less screen space than almost any navbar an author can put in the body of the HTML document, and they simplify site navigation for Web authors and readers alike.
For a good read on the LINK element, see
http://www.subotnik.net/html/link
To experience reading a site with links navigation, fire up Mozilla, Opera, or iCab and head on over to
http://danielgreene.com/vwvalor/
And please request this feature in Safari! =)