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interesting rulings for double faced cards

http://www.wizards.com/magic/magazine/article.aspx?x=mtg/faq/isd

here are a few that stood out to me

only double faced cards can transform. If you 'clone' the back face it will remain the back face because it has no back

if you change any dfcs current face into the human creature type or into a copy of a human creature and you cast a moonmist, it will transform.

dfcs can not be put faced down. If a card tries to flip it faced down, nothing happens
so you can't morph a dfc and Ixidron will not try when it comes into play.

and heres the one I found most interesting.
if your instructed to excile a card faced down, keep it's identity hidden.

and another rule change I personally like

card example:
dryad arbiter
Land Creature - Forest Dryad
'dryad arbiter is green'
1/1

the text on the card that identifies the color of the spell or permanent will be replaced with and oricaled to have the color identity circle you see on dfc back.
Though this has been known here is the important part
dryad arbiter lost it's color to Blood Moon because it lost it's abilities and transguild courior lost his colors to humble

when did they start making 60 card precons again?