I think Chain meant the FFS patch on aminet is an older version (40.19) whilst the last FFS beta was 40.20, since he mentioned updating the filesystem.
Edit.
I've just had a (very)quick look at FFS 43.20, and if you've got a hex editor somewhere loadup the filesystem,goto addr $0000655A, it should contain 4A80,6B02.
Changing them to 4E71,4E71 should remove the date compare and stop the annoying messages.
Then save it and update your HD with the patched FFS.
Or install SFS :-P