While Voyager observes the fight between the two ships, Captain Janeway assigns Chakotay to the conn after Paris leaves for the shuttle bay; but, in cutaway he stands beside Tuvok at tactical. While it could be assumed he assigned someone else to his new station, it's unlikely he would have had time, and no officer would abandon the conn position during a dangerous situation when a quick withdrawal may be needed.
At several points throughout the episode the dent in the side of Unit 3947's forehead vanishes in one shot and is back in the next. The most obvious example is when Torres brings the prototype unit online for the first time.
In the opening sequence, just after Harry and B' Elana decide to insert the EPS conduit into 3947, 3947 begins to follow Harry's movements around the room. Movement of 3947's head should have attracted their attention. Further, 3947's attention ends on a monitor viewing himself. Whereas his head should be skewed or turned to view himself from his shown position on the monitor, it instead looks straight up at the ceiling.
At 15:12, when B'Elanna Torres comes around the table in Engineering, you can see her wearing white shoes, not the standard black boots that go with the Starfleet uniform.
When Voyager is under attack and Tuvok says that the aft shields are down to 23%, they should've said that the forward starboard shields were down to 23% because the quantum resonance charges that were being fired weren't anywhere near the aft shields.