Hi All, I got a brand new 17" UMBP last week with Lion. Yesterday, I had to go away from the unit for a short time & when I got back to it there was a screensaver running. As soon as I got close to the Mac, I noticed that the fans were running at very high speed & the laptop was very hot. I have Menumeters installed in the menubar & the CPU's were all running at full with very high temps. As soon as the unit came out of the screensaver, everything started to go back to normal. I went into system preferences to the screensaver pane & just by going there, the CPU's start going crazy, temps keep rising & fans soon start to kick in after a while - this is without engaging a screensaver test. I tried this a number of times with exactly the same results. Can anyone tell me why this is happening & how it can be resolved? One does not need to have any app running at all. I would also be grateful if some other Lion users can see if this is happening on their UMBP's? Many Thanks, Bazzy!