Pagerank Algo Changes Afoot?

Google’s latest Page Rank tool bar update on 18.07.11 was the second in under a month, this is a fairly unusual occurrence, as normally Google sticks to a reasonably predictable schedule regarding exporting tool bar updates. Exports can roughly be interpreted as occurring quarterly, or four to five times a year.

The last time Google exported page rank updates in this manner was back in 2007, when the PR Algorithm was adjusted to penalise websites which were selling links. It could therefore be fair to assume that the fact there have been two updates in the last 30 days might mean that another PR algorithm adjustment is underfoot, possibly Panda related.