[UNITY v5 Personal Edition 64] Shadows shift troubles

Hello,

I have a point light (Realtime, soft shadow and very hight quality setting) and a table. The problem is : there is a shift between the table and the shadow (we could believe the table is floating in the air, but it’s false)

Does somebody could help me to get a realistic shadow position ?

I checked the documentation and I found some explication :
http://docs.unity3d.com/Manual/ShadowOverview.html

This problem is called " Peter Panning" and it is created by a too high bias level.

The problem is I don’t use Bias (I changed it 0, it doesn’t change anything).

Is there somebody who met the same problem ?