I found it!
After months of up and down with Google, I saw it with my own eyes!
Three hours ago Google downloaded my sitemap.
Three hours ago I went into oblivion, and disappeared.
Google Sitemap controls report my sitemap is OK with only one error for January 23, which I corrected the same day.
According to all of my notes, every major drop has resulted right after Google accessed my sitemap, and today, I saw it with my own eyes.
My most serious drop-off with Google, that lasted almost two months, came immediately after I had designated domain within the sitemap control panel.
Maybe this drop won't last as long, or maybe longer. But I am convinced that sitemap retrieval by Google is implementing the beginning of the fall.
I also know that I have a solid site, no spam and no black hat techniques. Google is losing out bigtime on authority sites, as the roller coaster continues, and good webmasters go away.
One other thing...my page ranks reported in my sitemap control panel have never recovered from the first major fall, and show that most of my site has not been ranked.
In fact, 98% of my site shows google page rankings, and has for over three years.
I still think something is broken at google.
[edited by: tedster at 8:10 pm (utc) on Feb. 1, 2007]
[edit reason] create separate thread [/edit]