I have no idea, but I'll try to buy such an adaptor (SD-to-CF) for testing later-on.
Not sure how long it takes before I have one.
What I use is a female IDE-to-SD adapter like this one:http://www.ebay.nl/itm/SD-SDHC-MMC-to-I ... 2a1d0a1593
It works fine, except you need to switch the atari off/on at first [sometimes] to startup the adapter.
Not sure why that is, looks like a bootup-error, lack of voltage or other strange unrelated atari-issue.
With the later 4.7.x versions this problem seems te be a lot less.
Perhaps I'm reading the adapter to early while still initializing :-/