When Bashir is intercepted by Garak upon arriving back at the station, in the background the end of the set can be seen as the walkway and its railing end abruptly. In addition, the whole promenade background seems to be sloping down. This is only partially concealed by the Jem'Hadar standing in front.
Sisko's voiceover says he & Bashir have been floating for six days in the damaged ship and looking for help but both are perfectly clean-shaven.
When the Defiant is leaving the station for its mission to the Gamma Quadrant, Sisko orders "aft thrusters at one quarter. Port and starboard at station keeping." But since the ship docks nose-first at the station, the proper order would be "forward thrusters at one quarter" -- the thrusters at the front of the ship need to push it backwards.
While Kira is trying to send a signal from the shuttle craft, Odo walks up and asks if she's had any luck. He gets to the doorway and keeps going without ducking, and his head brushes against the top of the doorway and makes a slight whooshing sound.