I'm sure such incidents are not uncommon, except for the size of the A/C involved. Why else would the CFS entry for Montréal/St-Hubert include a warning that a certain taxiway can be mistaken for one of the runways?
I've also heard of bigger gaffes than this. Around here it was a regular occurrence for student drivers to land not just at the wrong airport, but in the wrong country <img src="eek.gif" border="0"> I also heard of an incident at KAGS where a B737 was cleared to land, then put down at an airfield four miles away with a 3700' runway.