I use the google allert system to notify me if there are any backlink changes in the google SERP results. I have recently, since the last update, algo change or whatever you want to call it, been seeing backlink changes on almost a daily basis. I think that google may have started to continuously or at least more often update their backlink results. Maybe this was the change that google started doing at the last change, or maybe google just has some bouncing datacenters.