Most of my keyword SERPS show big changes in position this morning, both on www and 64.233.161.99. This is a lot more than the slight shuffling around that I usually see between updates. For example, the top keyword in my industry sector has me at 32 from 38. Other changes are bigger - a couple of 4th page keywords have moved onto the 1st page.
Does anyone else see this? Could it be caused by factoring in new backlinks or new PR?