When MacGyver is cutting the bamboo leg for the flare, one see he cuts a small end but when he picks it up and hands it to Debra, the bamboo piece is much longer.
At about 30 minutes in, when Mac and Debra are running in the middle of nowhere, a power line is visible in the air behind them.
When Peter, Sister Margret and the children are flying in the helicopter, they do a wide shot and show the helicopter is smoking, but there isn't anybody in the back of the helicopter. They should have been visible with all of them packed into the small area.
(at around 30 mins) Mac is handed a board with his "crimes". It is written in Vietnamese even though he is in Thailand.