Hi guys! I'm having some issues with the rankings of my best keyword in Google. I would really like your opinion about this. So... This particular page of my website was always ranking between the 2nd and 4th position for this kwd. That was until 2 weeks ago. It suddenly went down to the 90th position. That was for me clearly Penguin because I had a very high kw density and also many shitty forums links with exact anchor that I did in the past.I was preparing myself to clean my LB profile etc but the first step was of course to change the content. I changed the texts completely and surprisingly the day after it was back!That made me curious. I started thinking that maybe it wasn't Penguin but another part of the normal algorithm. Maybe some spam filter performing on-the-fly. The problem went back today again. This page is again in the 9th page for that keyword.What do you think is going on?Should I wait or would you recommend to start cleaning my LB profile immediately? (apart from many very HQ links I have also forums and directories manual links)Other consideration: This page is still ranking as before for some other keywords.Pages within this directory are ranking for the affected keyword. I'm really waiting towards to your comments! Thanks!