OK, here is a little Gem I noticed that a secondary phrase "snowboard france" for my ski site had bombed out today when all the others are good, stable and moving up [I have 32 in the 1st 10s] dropping from 18 to nowhere. On another site where I "generically" link to the ski site I had put a java redirect on a page with title "Snowboard France" <SCRIPT LANGUAGE=JavaScript>if (parent.location.href == self.location.href){window.location.href = 'http://www.ski-domain.com/'}</SCRIPT> This page now ranks.........yes.......18 coming from nowhere!!!! And, of course, it redirects to the ski site.
it maybe sort of duplicate content at target .... I have two domains that replace each other for a certain phrase about every 3 days yes the target pages are close in terms of content and it may just be from which direction the wind blows or if the g bot crawls on the right lane or on the left lane .... M