It's happened to me a few times over the years. When I'm accepting traffic in a non standard situation, e.g. on a radar heading from another sector due conflicting traffic I'll click to see where your flightplan says you want to go once clear. If I get the "say that waypoint again" in response it gets my guard up that something might be wrong (ie one of us is dog tired or we are looking at different flightplans).
ATC eff it up too. Remember the Northwest bound for Frankfurt years ago that was routed and vectored into Brussels? The crew didn't notice until they realised the runways in BRU were different colours to FRA.
Last edited by Una Due Tfc; 29th Dec 2015 at 01:52.