(Well, sorry to make a second post, but should be more clear for everyone)
The new function auto pick up was already present in some night build before ;
But in this version, i can’t save more than one rule if I exit the game (Only the first rule is saved).
They are still present if i don’t leave the game.
[Edit: Rule even disapear after sometime, looks like it happen everytime i leave the anthill.]
Tested with a fresh installation 0.7 linked in a post here.
(It’s only a bit annoying tought 
Edit : tested in the last night build 21/07 and it look’s like it work now. I can pick up arrow without problem !