Today many people are reporting changes in their PageRank and backlinks from Google. Some are increasing, while others seem to have dropped to a (temporary?) zero.
On some data centers, Blogger Buster has dropped to a zero, while on others the site remains at PR4. I'm not too worried about this, and imagine that the update is still in progress.
Have you noticed any changes in your PageRank in the past couple of days?
I will update this post as soon as I have any more information for you all. In the meantime, you can check out this PageRank tool which checks your blog URL across multiple datacenters to get an idea of these changes are affecting you too.