What is the ruling on opening an account with Tunisia's Zitouna Islamic Bank, and are its dealings compliant with Sharia, and is it different from other banks? Also, what is the ruling on selling fabrics for an ornamented khimar?

Zaytouna Bank is an Islamic bank, and dealing with it is generally permissible. It is better than usurious banks, and Islamic banks should be encouraged while others are boycotted. As for selling fabric from which women make their head coverings, it is permissible, due to the possibility of its use in permissible ways. Means that can be used for both permissible and forbidden purposes are not forbidden to sell, unless their use in forbidden ways predominates.