Jadzia enters the gateway building last, but she's first to enter the room in the next shot.
When Sisko checks the dead crewman, he places his fingers at the bottom edge of the crewman's ear, too high to feel a carotid pulse.
At 40:11 during the fight with the Jem'Hadar, Worf bumps up against what appears to be a stone wall, but it moves back and forth like a piece of cardboard.
When the Jem'Hadar are given their fresh vials of 'the white' (addictive nutritional substance), they connect the vials to tubes inside their uniform jackets, but they don't take out any empty vials.
When Weyoun accosts Odo in the hallway, and asks to speak with him (about the 40-minute mark), he joins Odo several steps down the hallway. The door to Weyoun's room does not close as he leaves its vicinity, but remains open during the entire conversation. The door only closes when Weyoun returns to and enters the room.
When Sisko and Omet'iklan discuss their views on disciplinary methods, the corpse on the floor can be seen breathing (chest rising and falling).
After returning to find the station damaged by explosions, Sisko never asks how his son, Jake, is.