Yeah I noticed a change. Unfortunately 1 of my websites went from 4 to 3 - although it appears no major drop in rankings. I have a feeling one of my links from a directory (or a few) may have been affected and hence my page rank dropped.
I say this because my website has new content published regularly and I have new influxes of links coming in (albeit from forum threads and other low pr pages).
It can be a little upsetting to see, however I'm working hard to push out a new website at the moment and I think that will attract more links from a larger variety of sites - just due to its content.
So yeah first time I've had a page drop in PR on me.
On the upside the company I work for, our PR went up across most domains. So this is a positive in terms of SEO I guess.