Since yesterday afternoon, people are noticing the little green pixels in their Google Toolbar getting updated. This is because of the Google Toolbar PageRank update and many forums are now talking about it.
We all know that Google shows something and uses another thing. A Google Toolbar Page Rank update is not at all related to changes in your ranking sooner or later. The PageRank scores you will see in the toolbar are outdated and don't have the slightest impact on rankings. Do not think that PageRank has no influence, but the score your toolbar will show actually does not have any influence.
The last PageRank update was done in April 2009 and it's just two months since then. Before this, Google updated PageRank value on the New Year's eve in 2008. Google updates its PageRank value in the Toolbar after a few months. So, the only thing is that the present update is more recent than the ones held in recent past.