Some things to check out: 1) is your site running pop ups of any kind? 2) is your site and links all SSL? 3) do you use or link to any affiliate tracking sol

Some things to check out: 1) is your site running pop ups of any kind? 2) is your site and links all SSL? 3) do you use or link to any affiliate tracking solutions like Cake, HasOffers, etc? 4) do you use any back button redirection scripts or other types of scripts which google might consider malware or harmful to the user?