Unity 4.3.4 iOS Warnings - iAD and Asset Catalog

Hi,

Starting from Unity 4.3.4 (maybe from earlier version also, as I skipped the previous 4.3.x) I am getting warnings in xcode when building for iOS.

I have built a completely new and clean project with only one scene, showing one sprite. Nothing else, and getting several warnings of two types:

iAD.mm deprecation warning Example:

 /Users/db/Developer/unity/Basic Test/Build/Classes/UI/iAD.mm:333:83:
 'ADBannerContentSizeIdentifier320x50' is deprecated: first deprecated in iOS 4.2

Asset catalog compiler warning Example:

 /Users/db/Developer/unity/Basic Test/Build/Unity-iPhone/Images.xcassets: 
 App Icons built with asset catalogs are unavailable on iOS releases prior to 5.0.

The build is set up for iOS 4.3+ and I have not added any icons, expecting Unity to add the defaults.

Should I worry about any of these? Or should I start building for iOS 5.0+?

Thanks in advance.