I just bought a new MBA 11", and downloaded all of the available software updates as soon as I got it set up at home. Among the available updates was Snow Leopard 10.6.6 with the App Store. Unfortunately, whenever I try to open the App Store it either a) fails to load at all - just gives a blank loading screen b) loads only 50% and leaves the top tabs (Featured Apps, New Apps, etc.) completely greyed out and unclickable, along with the search bar which is unclickable, or c) occasionally, loads normally. So far, I've tried repairing permissions in OS X, downloading and installing the 10.6.6 "combo update" from Apple, and contacting Apple Support (they're closed tonight). I thought I'd check here to see if anyone else has experienced this problem, or if anyone has ideas on how I might fix it. I'm new to Macs so I don't really know my way around troubleshooting Mac applications. Can I delete Mac App Store and reinstall it? I'd really like to not have to format and start over from scratch, since I spent a lot of time earlier importing my iTunes library, photos, etc.