More features added: IndexedDB, CSS3 Background-image options
Then there's the new CSS3 Background-image options including background-clip, background-origin and background-size. While nobody's reported this feature as missing, the new properties offer some interesting possibilities and deserve inclusion.
Two other minor updates: I've moved Chrome 6 up to be released later this year, with Chrome 7 in the "future". I've also changed the labels of the "Past" and "Far Past" columns to "Previous version" and "Two versions back" which more accurately describe the browser versions they contain.