Google’s PR Update
SEO and SEM people waiting to finish the PR Update this April for sure. Many observed perhaps their PRanks have changed. During this time of updates, ranks fluctuation usually occurs. Some high ranks going down and after the update, it will be on its place.
They said updates occurs quarterly. You can check your live pr by choosing what you want after google search here. A vast information about PageRank courtesy of wekipedia.org.