Thanks Aren - When importing the latest 3.7.7 into the Wii Unity 4.3.7f1 I get an error:
Assets/NGUI/Scripts/UI/UILabel.cs(1147,30): error CS0117: `UnityEngine.Font' does not contain a definition for `textureRebuilt'
The funny thing is that this occurs in a conditional block surrounded by
#if !UNTIY_4_3 && !UNITY_4_5 && !UNITY_4_6
So it looks like Unity Wii is not setting UNITY_4_5??
Thanks again for your help