…If so then you have probably used too little variation in your anchor text.
It is not really new knowledge that having only a few anchor texts and thousands of links with that might not be a good idea and makes your backlinks profile stick out a bit. What is new is that google now pays even more attention to that and you will loose a lot of rankings if you don’t act now.
When Google announced the latest update they said it would come “in the next few days” … well actually it came the very next day. Rand Fsihkin of SEOMoz created a very good video in which he explains what you should do BEFORE the Algo Update comes … well the update is there so if you need hints what to avoid, now is the time to get your site straight:
Rand clearly teaches a very “white hat” approach and there might be a lot of SEOs who will tell you “…but method xyz still works” … and they are probably right.
It is a question of what you want to risk and how well you can manage those risks with methods that are little more on the grey side of white hat čśë