My forum was PR3 before this update they suddenly last two days it was showing PR2 (probably because my server was down for a month) and today again its PR3
yours better than me. my several sites drop forever 2 from PR4 to PR0 1 from PR4 to PR3 1 from PR3 to PR2
They seem to be making changes to the way PR is given. It might take some time for the alterations to become stable.
PRs may vary from servers to servers. Try this site to check PR rankings recorded by all Google's servers. http://www.seochat.com/seo-tools/