ecmedia - 6:01 pm on Dec 11, 2012 (gmt 0)
I concur with those above who are reporting a change affecting some websites. One of the domains that I manage has relatively low traffic but a solid website that operates in the business management niche (run by an senior management consultant) that for reasons I do not understand dropped like 80% on Nov 27. Initially we thought that there was a software glitch or too many senior business executives taking time off for Thanksgiving weekend but it did not recover several days later and we wondered if there was an update. Looks like there was but more likely a Google algorithm bug because today I am noticing normal traffic.