I know that these processes have to do with spotlight but the high activity you can see from the screen shot occurs quite a bit. Ever week, maybe? It'll be this way for hours, and if I am only using the computer intermittently, closing it when I'm not using it, the high activity can remain for a day or more. Is this normal? I didn't notice it under SL. I installed Lion on day one, and I don't notice this activity on my "beater" 2008 aluminum MB, only on my 2011 MBP.