(at around 28 mins) When Buffy is sent flying, there are faint traces of the wires supporting the stunt woman are visible against the wall in the background.
Buffy picks up her mother's medication at the hospital. She sees Ben, and you hear him say "not to be rampantly sexist, but you have some serious muscles for a girl". However, his words don't match his mouth.
While Glory interrogates the bound priest a crew member can be seen on the left side of the screen behind Claire Kramer after she delivers the line "Forgive me monkey".
(at around 34 mins) When Buffy is apologizing to Dawn and the camera angle switches to behind Dawn facing Buffy, you can see the boom mic bobbing in the upper left-hand corner.
At 24:14, as the camera tracks Buffy stepping back into her circle of sand, it also picks up the boom microphone in the upper left corner of the frame.
Later on, it's revealed that Glory and Ben share a body. We see Ben at the hospital when Buffy picks up her mother's medication. However, at the same time Glory is still trapped.