Forbin001 - 5:07 am on Dec 7, 2011 (gmt 0)
Recently I deoptimized the home page to emphasize the internal page. There was a risk that google would drop any relevancy of the home page if I wanted to switch it back but I did it anyways.
For a month my rankings did drop, and google was still emphasizing the home over the internal, so I reoptimized the home page and things went back the way they were before.
A risky move, but this is what happened when I did it. My 2 cents, cheers.