We should also note that Kerry is documented, as far as I know, to have said that he was in Cambodia at Christmas only twice - once in that 1979 Boston Globe article, and once on the senate floor in 1986. It's just that these two instances have been quoted and requoted over and over again.

By 1994, he was already saying that he was "near" Cambodia. So it's not really a recent retraction, such as it is.