What effect did the June 2010 Toolbar Page rank update have on your site? I have noticed one odd effect. Several of my sites have had no change in pagerank and also have more traffic but many of the pages that used to be cached are no longer cached.
I will be keeping a close eye on this and what long term effect, if may have if any it may have on the overall SEO in the SERPS. There may be absolutely no negative ramification but it could be a sign of something on my personal sites that could prove to be detremental in SEO of those sites.
I have not seen anything of this sort on any client sites as of yet. If you have had similar issues with sites we would like to hear about it.