i was just sitting on my computer this afternoon and suddenly nothing was working properly. the OS loads very slowly...then once it does load, regular apps load okay, but safari and firefox and finder will not show up. it goes to sleep much faster than it usually does. i get spinning beachballs all the time. strangely, if i click a link in adium, it will come up in safari just fine. i just upgraded to safari 4, so is that maybe a problem? any ideas?