Trial to iOS version

Hi,

Think I must be going mad. :-) Yesterday while still within my trial version I am certain my app on the iPhone was running at 60fps. Today after upgrading to the iOS version (not pro) I am struggling to reach 30fps. I pulled everything out of my app and just have 1 skinned mesh on 1 cube; so 3 textures and still hover around 30-45fps. Did the pro version do some fantastic optimisation that I am now missing?

Thanks