I'm really devastated, because this website has been getting me lots of $$$ It was top 10 for all it's main keywords for weeks, but all of a sudden it dropped to 400+ for most it's keywords and 100+ for the others. Over a week ago, I built 125 high PageRank blog comment backlinks to the site, they were mostly high quality ones. But this has never really happened to me before so I'm rather confused. I haven't received any messages on webmasters yet, but could this be the reason why my site was sunk? Or is it going through a google dance which I highly doubt it because it was rank top 10 for many weeks.