<i>Perhaps it's due to the somewhat limited graphics capabilities of the MBA -- mostly due to its lack of a dedicated graphics card -- but it does, on occasion, have a bit of trouble with quick screen refresh and occasionally just gets bogged down completely. And yes, when it does this, you are treated to the spinning beachball show for several seconds until things get going again.</i><p>I'm looking forward to the 2nd or 3rd revision when the performance issues are resolved.