Are we getting short changed? On Apple's site (http://www.apple.com/macbookair/specs.html) for the Optional 64GB solid-state drive at the bottom of the page it states that "1GB=1 billion bytes. Actual formatted capacity less." So by this math, 64GB = 64,000,000,000 bytes. If you convert that gigabytes it should be 59.6GB. Why is the capacity in Disk Utility showing 55.5GB? Is this a 60GB SSD drive? I know people have complained about similar issues before (see here: http://forums.ilounge.com/archive/index.php/t-132092.html) but I don't understand the 4GB discrepancy (59.6GB vs 55.5GB).