pageoneresults - 7:50 pm on Mar 15, 2010 (gmt 0)
Matt Cutts: re: link juice loss in the case of a domain change: “I can certainly see how could be some loss of PageRank. I am not 100 percent sure whether the crawling and indexing team has implemented that sort of natural PageRank™ decay”
My Comment: In a follow on email, Matt confirmed that this is in fact the case. There is some loss of PR through a 301.
They are specifically talking about domain name changes and not on site 301 > 200 scenarios. Just want to clarify that.
There is further discussion at...
29 Tidbits from my Interview of Matt Cutts
301 Redirect Means "Some Loss of PageRank" - says Mr Cutts
Title might be just a little misleading but, you know us SEO types. :)