No I actually went through and attempted to price up an F fare and it let me do it on CX.com.

The reason I was looking is that I am planning a AONE and was suprised to see the F flights showing to ICN (which I wouldn't mind visting).

But I have had a bad head cold the last few days and perhaps I was hallucinating


Just wanted to add that it looks like the once a week (M) 3 class 333 moves to four times a week (M Th F S) from April 08 right through to as far as I can see on EF.