Was recently working on one of my main sites. Slowly building links, from not the best quality all the way up to some juicy PR9 links, no spam. The rankings were increasing well, not too fast but sure enough. More of my keywords were starting to rank. Then suddenly I got butt assaulted, now all of my keywords are out of the top 500 - bar one. That keyword doesn't have much competition and is pretty much my URL. It's still ranked number 1. Has the new update ruined me? Is there anyway back from this complete devastation?