Hello guys, So this started with me just after Lion OSX released and I was using SL at that time. While working on my iMac in a sudden the OSX logout it self and re-login automatically and closing and reOpening all my application like if I just restarted my machine . I thought this because of SL OSX so I took action and I've upgraded to Lion OSX. But unfortunately the problem still happening with me even with Lion OSX. I would love to do a reinstall but I don't have the time to do it right now and I'm pretty annoyed of this problem which costs me loss of my unsaved data. I'm sure there are users who have the same problem as well. Note: I'm using an mid 2010 iMac 27inch 2.93 i7 core with 12Gig ram. Thank you.