Marcia - 12:01 am on Feb 17, 2007 (gmt 0)
I found some key phrases that I suspected were the problem. Then I searched my site for those words and checked how the other pages with those phrases were doing in the serps. Sure enough some other pages with the phrases were down as well.
Phrases aren't automatically down, and can it be certain that particular phrases really are a "problem?" If they are, it may not be that they shouldn't be on the pages - maybe there's some other reason.