Strange issue when target to new iPad( 3rd Generation )

Hi, guys:
Now I just finished my game, and run smoothly and perfectly on iPad2.
But when I target it to the new iPad( 3rd generation ), things go bad, here are some details:

  1. More memory allocated when game runs.Sometimes even receive memory warning.
  2. Frame rate dramatically less than on iPad2, and is unstable( from 30 drops to 10+ suddenly ) all the time.

Fact is that “iPad3” is more powerful than iPad2, but how these issues happened anyway?
Are there any special steps need to be taken care when target to iPad3 ?

[P.S]
Unity 3.5.6
Xcode 4.5.2
iPad 2 with iOS 6.0.1
new iPad with iOS 5.1.1 ( Jailbreak )

build:
iOS SDK: 6.0.1
target iOS : 4.3
Architecture: Armv7

The iPad3 is not more powerfull.
It has the same cpu, 4x the pixel but only 2x the gpu power.
So if you use fillrate heavy things the performance will actually drop.

The memory warning though is strange unless you have 20 other apps open. Did you use higher resolution assets? that would contribue to above problem as well as the memory one

Thanks for the reply.
Here is my condition, I got many high resolution textures within, so what options do I have ?
Also wonder will the same texture cause more memory allocation when it is on the iPad3?

So, wait. Apple stuffed up again like they did with the iPhone 4? Oh great!