As the title says, I am having some serious issues with iWork on a 2011 i5 MBA. I am working in Numbers and every time I click something I get a pinwheel for 30 seconds or longer. I have tried closing everything, restarting, turning it off and letting it sit and powering back on. With activity monitor open I see that iWork is at %100 pcu usage when I am trying to do the simplest of tasks in it. You would think that a $1200 computer would be able to run the software that was designed for it. Any suggestions before I walk into the apple store and discus this thing across the place?