At 31:10 when Jim Phelps visits Marley by the pool to introduce himself, there is a towel behind Marley's head from his massage. Before he goes to stand up it's missing, yet when he stands up the towel is there again.
One man was using binoculars with an integral compass in them. The way that those types of binoculars work is that they use sunlight to project the compass bearing into one of the scopes, but no bearing can be seen in the first person viewpoint looking through the binoculars.