Hello!
I own about 70 websites and 8 of them lost their pagerank 2 month ago because we have had problems with our dns hoster! This time google shows the decsription of the 404 website in their index. This description could only be taken up 2 month ago and now they show that description!
I really don't know why they do that because the sites were only down for 10 days and not for the whole month....! I think thats not fair because it was only a short time...!