Hi all, So I have a late 2006 MacBook running OS X 10.5.6. Today I noticed that my iCal icon was translucent and there was the "?" on top of it. Confused I clicked on the applications folder in the dock and the grid showed all of the applications on my mac, however it was only about 35 applications. Normally I have the full grid plus 10 or so that are left to see in finder. Now I was worried so I went to the actual applications folder and there was a lot of empty space in between each app, the perfect amount of space for the apps that are now gone. So I clicked on iPhoto and iChat in the dock and both appeared with question mark... And oddly enough I had been using iChat but didn't realized that it disconnect from the internet, so I quit it and tried to restart which is when I got the question mark. Does anyone know what could possibly be happening?? I'm really at a loss here and am quite nervous. I do have weekly backups of my computer on a Time Machine which makes me feel a bit safer, but I still would like to know what is causing this... Thanks for any help!