In the Pale Moonlight - S6-E19
Visible crew/equipment: After Jadzia plays devil's advocate with Sisko, he tells her she would've made a decent Romulan. Then, when Sisko passes the camera as he walks around his desk, the blue T-mark is visible on the floor behind Jadzia. (00:06:10)
Visible crew/equipment: When everyone returns to DS9, Worf and Jadzia reunite and kiss. Then, in the next shot, just as O'Brien calls out to Quark, there's a visible T-mark on the floor. (00:42:15)
Resurrection - S6-E8
Visible crew/equipment: When Bareil enters his quarters and finds Intendant Kira dressed like Major Kira, just as Intendant Kira walks towards Bareil, in the mirror we can see the reflection of a crew member wearing a white shirt and shorts. (00:36:55)
Chosen answer: No. He's given his name, that's all. Nothing there that might lead to a paradox. If he's gone into detail about his time travelling, that might cause an issue or two, but simply stating his name does nothing.
Tailkinker ★