Apple's Mac App Store may be the first step in the company's plan to treat desktop software just like iOS apps, but it's still encountering a few teething problems. After the installation issues
widely reported yesterday, now it's the turn of poor software validation opening the door to easy piracy. It seems that some applications don't entirely follow Apple's guidelines
for validating Mac App Store receipts, and so some paid apps - like Angry Birds - can be bootlegged
with receipts from free downloads.