A week or so ago, there was a Google toolbar PageRank update. I am now seeing several reports at DigitalPoint Forums and updates to a WebmasterWorld thread that Google seems to be rolling back that toolbar PageRank update.
Honestly, I am not convinced yet. It can be that some data centers have not yet updated and maybe those data centers are showing older toolbar PageRank scores. Or maybe not.
Why am I so skeptical? Simply because Google knows that toolbar PageRank (what we see) is almost meaningless. Why would they go through the effort of updating PageRank and then revert it back? It just doesn't make much sense to me.
Should you care? No. Spend your time on your site, content and rankings.