To reproduce:
1) Open the user attached project DimBug422 with Unity 4.2.2
2) Find 'dim_move' between project files and press it
3) Drag 'dim_low_low-rigged' model to inspector of 'dim_move' preview window
4) Press play button in preview window and you will see the animation playing, this is expected
5) Now quit without saving and open same project with newer version of Unity, 4.3.1f1 for example, while upgrading the project
6) Now press 'dim_move' again and drag 'dim_low_low_rigged' model into preview window of 'dim_move' in the inspector.
7) Play the animation and notice that model will not move, this is unexpected.

'CharacterSelectIdle' animation works fine in both versions.
Also notice an error log in console, afaik you should not get any errors while upgrading project.