Page is a not externally linkable
-- Google SEO News and Discussion
---- January 26 2011 Change - Back to "Zombie Traffic"
tedster - 3:20 pm on Feb 1, 2011 (gmt 0)Thread source:: http://www.webmasterworld.com/google/4258897.htm
This seems to be the crux of backdraft's situation - the QUALITY of the traffic changes, not it's volume or (apparently) the rankings. If I've got that right, then any connection to the announced update seems hazy.
Brought to you by WebmasterWorld: http://www.webmasterworld.com