Some sites have reported that there's a possibility that Google has changed their Page Rank algorithm, resulting some decrement to their page rank point, including YouTube from 8 to 3 (From Googlified). From SitePoint, i got this new update:
# Boing Boing: Was 9, now 7.
# Engadget: Was 7, now 5.
# Forbes.com: Was 7, now 5.
# New Scientist: Was 7, now 5.
My blog is affected also. It has dropped from 6 to 5 currently. Does your blog gets affected also?