I find nothing on google or any other site that keeps track of page rank update that says there is any page rank update going on.
There was earlier a tool bar rank update.
I've seen a lot of my site drop pr lately, so this must be rather recent.
How frequently do Google do pr updates these days?
All of you that say there was a page rank update by google in december, prove it!
Give me proof!
Say so is not proof!
All it is is this:
google has minor updates on new sites, and minor updates to toolbar rank.
But so far, no far reaching page rank updates on all sites.
It seems that around every Panda update there's some sort of PR update. Perhaps because both algorithms use the same resources.