Digilib doesn't display a public item in a private collection when not logged in

[nabeta]

Digilib doesn't display a public item in a private collection when not logged in. But digilib works if:

• logged in as an owner of the item
• the owner makes the collection public

I'm using a default digilib-config.xml. http://imeji.org/features/digilib/

[bastiensaquet]

done