Hold on to your seats - there is a Google PageRank Toolbar update happening right now!
In any event, ranking changes have no direct correlation to a new toolbar PageRank update. Google's PageRank numbers are constantly being updated internally and Google gives us a sampling of it from one point in time every few months or so, just to keep their *PR* wheels moving.
That being said, PageRank is a pride for many web sites and I do hope your PageRank increased so you can wear that badge with honor.
Forum discussion at DigitalPoint Forums.