I agree to always check on the six months. This just happened to Grant's parents last month. They had been in Hong Kong for a few days and were going on to Bali. When they went for their flight HK-Bali, they were turned away as they didn't have 6 months validity remaining on their passports. It all worked out OK as they were able to get their passports renewed by the consulate in HK, but they did have to rearrange plans and spend time dealing with the passports.
Dena