I noticed two days ago that I had a graphics (and other) update in the App Store waiting, but as it required a restart, I was waiting until some processes had completed. Now when I wanted to install it, it was gone! I tried refreshing, etc. but nope, it's gone. I went to the update here (http://support.apple.com/kb/DL1609) and I can't download it manually either!? What gives? Did I forever lose out on a chance to get this update? Or did they pull it for some reason?