I think this was a strange 'false updat' because it showed what the pr was for my sites on the last update but then reverted back. Very odd.
I agree this happends al the time thats why I use different pr checkers offten reason is thier made up of different codes and servers,
some times google has gliches in them, here is a really god one for you to add to your browser pr checker one of the best and by far the most acurate
Im back the recent pr up date was a good for my sites virtually all my site whent up by as much as 2 or more thre of my site whent fro 0 to 3 can you beleive this! hmmmmmmm let everyone know