Anyone notice some weird SERP activity in the last 24 hours? One of my inner pages specifically targeted for a certain long-tail keyword ranked on page 2 about 3 - 4 days ago. This morning, I checked it again and it just disappeared... can't even find it up until page 20... However, now my home page is ranking on page 3. Haven't done anything "blackhat" related on this site though, so I'm dead certain it's not a penalty.