There were earlier reports that the latest version of MXEdit/Universal Browser was not converting ccf's correctly but I thought it had been fixed.

I think that you are saying that a few of those 256 commands worked and the few that did were already on the OEM remote. That makes me think something is still wrong with the conversion routine.

If you are saying that the ones that worked replicated every command on the OEM remote (which will only be a fraction of the 256 commands) then the conversion routine is probably working OK.

Do you have an OFA remote by any chance?