Hi Ddibling, it's a bug with the OpenFeint plugin. Since I didn't have an ipad2 myself, it seems Apple didn't review it and it went through with that issue (it works on iphones).
On next version I removed OpenFeint from all iOS devices to avoid problems with the iPad2 and older iPods. I'm waiting for Apple approval, but it should be in 1 or 2 days. I'll post here as soon as it's out.