Pathfinder

A picture of Tom Paris in a cadet uniform is shown on Admiral Owen Paris' desk. It is actually a picture of Robert Duncan McNeill playing a different character in the Star Trek Universe: Nick Locarno from The First Duty (1992). Depending on which story you believe, either the Tom Paris character was originally meant to be Locarno but there were legal issues with "The First Duty"'s writers, or the Tom Paris character was developed separately and McNeill's casting was an afterthought when someone noticed the similarities between Locarno and Paris.

Barclay's holographic simulation of Voyager includes the former Maquis crewmen in their civilian clothes. However, the Doctor, when he was transferred to the Alpha Quadrant two years before, informed Starfleet of everything that had happened to the Voyager crew. Presumably, this would include the fact that the Maquis had been integrated into the Starfleet crew.