What’s up with PubSub?

Something seems to have changed with PubSub’s LinkRanks the last 24 hours. My ranking has dropped considerably, and so have several other blogs that yesterday were in the top 10,000, while many others have seen no change at all. I know that the rankings can change substantially overnight, but this seems to be more than a coincidence. For example:

* Adland 36,290 (-35,103)

* CorporateBloggingBlog 42,407 (-22,787)

* Crossroads Dispatches 36,938 (-32,603)

* Earnie the Attorney 37,366 (-33,985)

* Kunal.org 36,553 (-34,735)

* Media Culpa 40,039 (-32,544)

* Micro Persuasion 35,795 (-35,558)

* Mymarkup.net 38,346 (-34,058)

* NevOn 36,733 (-34,674)

Could it be that PubSub are adjusting their system in a way that affects some blogs a lot, while others are not affected at all? Steve, it’s your client. Am I too suspicious or has something changed?