It looks like we went through a Google toolbar PR update yesterday. How did you guys fare? I can't complain. Homepage stayed PR7 and all top level forums and categories went to PR6. Unfortunately, my link directory went down from my second PR7 to PR6 as well.
The changes you are noticing might not be permanent. Your PageRank can go up and down in a moment. We are in the middle of a major update/infrastructure change of Google's called: BigDaddy. What we are all seeing now I call the Google Hurricane. My guess is by the end of this month BigDaddy will be completed. Then your PR will have settled to what Google thinks it should be.
No one has posted to this discussion for at least three months. Please let old threads die and do not reply to them unless you feel you have something new and valuable to contribute that absolutely must be added to make the discussion complete. Otherwise, please start a new thread in this forum instead.