Hi,
just as the title suggests I noticed weird clipping behaviour when using NGUI with Unity 5.6.
The clipping can be seen in this gif on the lefthand side.

This problem however only occurs in standalone builds while using Direct3D11.
If I disable Auto Graphics Api for Windows and force Direct3D9 everythings looks as expected.
Since we do not use any advanced Dx11 features this isn't a big problem for us but I wanted to let you know that it exists.