Thanks very much Dom for your reply. It must’ve taken you forever to write 
I’ve examined and re-examined everything. Yep, I found 5 link partners that were previously ranked by google, but they must’ve gotten banned during the last update. I’ve deleted them. I’ll be checking my link partners more regularly from now on. As I said before, I made the same exact updates to a few other sites and although they all disappeared for a day or two, they did come back, except for one. The only thing that I can think of is that I had purchased a few pr 6, 7 and 8 text link ads about 10 months ago and everything was going really well until a few weeks ago when I heard that google is going to start penalising sites that buy paid links… so, I had those pr 6, 7 and 8 links deleted and a couple of weeks later, I drop 800+ spots in the serps. It’s ironic, because nothing happened until I deleted those high pr incoming links that I’ve had running for well over 10 months. This is the only difference that sets this site apart from the other sites that have come back. Anyway my site is bouncing all over the serps and still has a high pr, so I’ll just wait for whatever penalty that I may have acquired to pass.
SlotPlayer, thanks for the http://www.delorie.com/web/lynxview.html link.. I’ll check it out.