For some of "my" keywords this morning I'm getting results that are similar to what we had in May: URL's that are dead since many months are showing up again, and low quality sites appear high in SERP's. Is Google playing with an old database again?
Overall I have to say that since May I'm more and more using Altavista for my own searches, and in most cases I'm getting more relevant results there than on Google. I know, we had this discussion going on for a long time, but unfortunately it's a fact: the quality of Google has dropped considerably, and sooner or later users will notice this.