People have been complaining about the latest Google PageRank update that lowered many sites PageRank by one or two points (not mine though); now Google is doing another, more selective update of PageRank according to Andy Beal .

Also, today it was announced Google's has defused "GoogleBombing" and I picked this snipped from Traffik:

"…Danny explains how Google has made a slight algorithmic shift, so that "miserable failure" doesn't bring up the WhiteHouse.gov page anymore, but does leave legitimate commentary on the "bombing" intact. (Seems correct. The only weak attempt I've made at a GoogleBomb - type "woefully out of touch" with the quotes into Google - had an article by a Globe and Mail reporter ranking at the top. Now that's pushed down to 18th place, while my commentary on the bomb ranks #1.)".

I'm wondering why Google is updating the PageRank algorithm so soon after finishing an update of it.