Did something happen with way keywords are used or ranked back in March? I just looked at my historical rankings for certain keywords and I had huge jumps on my most important keywords during that time. I also had another huge jump in May. In March I went from being ranked in the 70s to the 40s, and in May from the 40s to the teens, since then I have inched up to the 3rd spot! It's strange that these jumps are happening on the 1st or quickly thereafter.