Which shuffle?

Which shuffle does the 'Always shuffle this playlist' option pick up? I would suggest that it should be the same, ie currently the last used shuffle mode. Someone has suggested having a selectable 'default' shuffle mode. That would be cool too.
(In effect this is what we really have at the moment. What we would really be changing is that the shuffle menu has an additional 'one-time' selection layer.)

I don't see the need to allow any/all of the shuffle options from this new feature though. I would hazard a guesstimate that 95%+ of all shuffled playlists (per player) are the same shuffle - ie the 'default' shuffle. Since this new feature is a convenience item, I believe that by ignoring that <5% that the selection is going to be that much easer for the other 95%+. I'd suggest simply adding replace(s) as an option to the down,down,long_down menu.