Google PageRank Update in April - Hick up?

The more time passes the more I realize how worthless the google toolbar PageRank is. The first thing that pissed me off is when I started a website which had a pagerank before any kind of links were built. I did a backlink analysis on Yahoo, because Google’s link: query is completely worthless. The result was no links. Since I was using a virtual host I realized that that page rank must be left over from another website.

Last night PageRank hick up was  ridiculous. I was about to write a great post on Affiliate marketing when I realized that the PR was up to 5 on this site. Of course I went to check my clients websites to see if their page rank has moved. The PR was all over the place. I went to check my own websites and it was a similar story. Within 20 minutes all the PageRanks reverted back to what they were previously.

Was this just an error on Google’s part? Has anyone experienced anything like this before? Is this a sign of something bigger to come?