When O'Brien and Sisko are escaping from Kira and the others. Sisko throws his communicator on the floor and tells O'Brien to do the same. Later when they are in the cargo bay Sisko is standing behind some crates and the communicator appears and disappears from his tunic
When Kira is attempting to recruit Dax at Quark's, she has her ear jewelry on, but in the same scene, when she manhandles Quark, the jewelry is missing.
The drink Quark prepares for Dax has three layers, but only the top layer stays level as Dax and Kira drink from the glass.