We got back last week and had a wonderful time...such a beautiful island, but when we were leaving a couple of ladies on our flight were called back to the final security checkpoint for a 'double check' of their passports and bags. The security guys tore up their purses, looking for 'whatever' and in the process pocketed a couple $100 bills. Luckily the ladies noticed immediately and informed the other security people, the guys were searched and the money recovered from their pockets.
Definately not the place you expect to get ripped off after surviving the plaza and flea markets, but it happened. I'd recommend keeping your cash in your pocket when boarding.