thayer - 12:29 pm on Apr 1, 2011 (gmt 0)
One change I have noted in one of my niches is the demotion of pages with "too many" popular keywords in the title. In this niche, "fuzzy widgets" and "blue widgets" are popular two-keyword searches (with more than 100k monthly G searches). In olden times it was often desirable to have a page which included both "fuzzy" and "blue" in the title. But now, pages in this niche that have both anywhere in the title are way down the search results for the two-keyword combos (though video titles seem less affected).