uGUI - Button auto-generate animation continues to play after finger tap.

The auto-generate animation on the Button Object continues to play after tapping the button on an iPad 4.

On PC in the editor, if I click the button the animation plays OnMouseOver, it will stop playing when cursor is moved off the Button.

Repro Steps:

1. Launch attached uGUI2.zip project into 4.6b1 and load scene named GUILearning
2. Hit play mode in the editor and Click the middle button
3. Observe animation playing while clicking and OnMouseOver
4. Build and Run the project to an iPad4
5. Observe tapping middle button the animation continues to play
6. Tap empty space and also observe animation continues playing.