Steps to reproduce :

- import the project attached in Unity 4.3
- open the scene Big10_KeyboardScene
- open the script Big10_OnScreenKeyboard
- at line 530 change the values to ( FadeGui(0.0f, 1.0f, 5.0f) )
- press play and notice that while the keyboard is fading in the buttons are opaque
- open the project in 3.5, project attach din the user's reply
- repeat the steps above and notice that the whole keyboard including the buttons are fading in

*Note:
Regression from 3.5.
More info in the user's last reply.

Duplicate :
http://issuetracker.unity3d.com/issues/gui-dot-backgroundcolor-doesnt-work-anymore-since-unity-4-dot-x