This morning brings news from around the web of losses to the Google Toolbar PageRank (the little green pixels displayed in the toolbar) for a myriad of sites. The best coverage I've seen comes from Andy Beard, as well as SEJournal and SELand (which has a comprehensive list of sites discussing the update).
If you didn't know already PR IS USELESS!!! ;-)
Seriously PR is just a pretty graphic for entertainment and now that is basically officially proven with the help of the lastest PR updates. Some of the largest websites ON THE INTERNET had their PR mostly slashed in HALF!...
I've gone through many of the threads and tried to pull together an accounting of websites that have been "reportedly" affected by the update. Hopefully, by collecting this data, and combining it with reports in the comments, we can have a relatively comprehensive view of the landscape and make educated guesses and hypotheses as to the root causes:
- www.autoblog.com PR6 > PR4
- www.forbes.com PR7 > PR5
- www.engadget.com PR7 > PR5
- www.problogger.net PR6 > PR4
- www.copyblogger.com PR6 > PR4
- www.joystiq.com PR6 > PR4
- www.tuaw.com PR6 > PR4
- www.searchengineguide.com PR7 > PR4
- www.seroundtable.com PR7 > PR4
- www.searchenginejournal.com PR7 > PR4
- www.johnchow.com PR6 > PR4
- www.quickonlinetips.com/PR6 > PR3
- weblogtoolscollection.com PR6 > PR4
- andybeard.eu PR5 > PR3
- www.volodymyrzablotskyy.com PR4 > PR2
- daily.stanford.edu PR9 > PR5
- www.thecrimson.com PR8 > PR4
- www.statcounter.com PR9 > PR6
- www.washingtonpost.com PR8 > PR5
- www.blogherald.com PR7 > PR4
- www.seopedia.org PR6 > PR5
- weblogtoolscollection.com PR6 > PR4
- www.masternewmedia.org PR7 > PR4
- www.sfgate.com PR7 > PR5
- www.suntimes.com PR7 > PR5
- www.seo-scoop.com PR6 > PR3
- spap-oop.blogspot.com PR5 > PR4
- Onemansblog.com PR8 > PR5

Yo cuz, I see you couldn't resist commenting on the news either :-P