Assalamualykum
Their has been an interesting polemic against islam going quite recently that Sharia law requires 4 male witnesses to prove that a rape victim was raped and if she cant bring 4 then she gets 100 lashes.
Here is an excellent article by Danios from LoonWatch refuting it.
http://www.loonwatch.com/2009/12/testimony-of-rape-victim/