At the end of the episode, there is a shot of the message in the Prophesy that Wesley translates. In the second shot that ends the episode, the handwriting is visibly different - the O is now joined and the N has lost its flick.
During the stakeout, there's a shot of Fred and Gunn from behind the truck, pulling away from their kiss and facing the front. In the next shot, from the front, they are still facing each other.
When Angel's cellphone rings, Groo says "your coat is singing", but Lorne has previously stated that there is no music in Pylea, so Groo should not know the word "singing" or the meaning of it - unless Cordelia has taught him it before.