yesterday, when I restarted my my pb, it wouldn't load the finder. Everything else seemed to work other than the finder. The bar wouldn't be there, but if I were to open up safari, the top bar will appear, and once I quit, it would disappear again... with only the date, time, and battery life in the corner. So I rebooted again, and it still didn't work, I'd right click on finder (the face) and it said "application not responding" and "reload again" and I'd click on reload and it still refused to work. I gave up, and this morning, when I woke it up, it was fine again. As if nothing had gone wrong. Does anyone know what this means? or what went wrong? 
thanks.
thanks.