Updating to CM10 Problem

[YPA]

Phone details:
Model Number: GT-I9100
Android Version: 4.0.4
CyanogenMod Version: 9.0.0-RC1galaxys2

I tried installing the stable version that was released on the 13th and I get this message:
assert failed getprop ro.product.device (and a whole load more stuff).

Anyone know where I'm going wrong and what I should do about it?

 

[YPA]

Anyone able to help?

 

[lunatic59]

I don't see a stable CM 10 release on the Cyanogenmod website. Where did you get it?